Endocrinologists

Fragkoulopoulos Euaggelos is an Endocrinologist - Diabetologist who maintains a private practice in Nea Filadelfeia. He graduated with honors from the Medical School of Naples in Italy and completed his specialization in endocrinology at the General Hospital "Red Cross". During his specialty training, he worked at the Children's Hospital "Agia Sofia" focusing on pediatric endocrinology. He has worked at the Garyfallidis Institute (KAT) on osteoporosis issues and at the General Hospital - Maternity "Elena Venizelou" on reproductive endocrinology matters. He has served as Medical Director at NovoNordisk, primarily involved in the design and development of clinical trials for new insulins and other medications in the treatment of Diabetes Mellitus. Additionally, he has served as Medical Director at Bristol Myers Squibb, focusing on research of new pharmaceutical formulations for Diabetes Mellitus and other therapeutic categories. Finally, he has participated in numerous international conferences and has conducted a substantial number of medical studies.

Το Πολυϊατρείο Affidea Περιστερίου είναι ένα σύγχρονο πολυϊατρείο που εξυπηρετεί ασθενείς από την ευρύτερη δυτική Αθήνα, προσφέροντας ολοκληρωμένη πρωτοβάθμια και εξειδικευμένη φροντίδα υγείας κάτω από μία οροφή. Με εξειδικευμένους ιατρούς σε ένα πλατύ φάσμα ειδικοτήτων, το κέντρο καλύπτει τις ανάγκες ολόκληρης της οικογένειας - από προληπτικούς ελέγχους έως εξειδικευμένη διάγνωση και παρακολούθηση.

Dr. Markou Mairi is an Endocrinologist-Diabetologist and maintains a private practice in Kolonaki and Livadeia, Boeotia. She graduated from the Medical School of Aristotle University of Thessaloniki (A.U.Th.) in 2007 and specialized in Endocrinology, Diabetes, and Metabolism at the General Hospital of Athens "Evangelismos," acquiring significant experience in endocrinological cases. After completing the mandatory Rural Service, she completed the general part of her specialty in Internal Medicine at the General Hospital of Volos from 2010 to 2012, participating in the clinic’s operations and the hospital’s daily general on-call program. Until the start of her specialty training, Dr. Markou worked in the NHS (National Health Service) of the United Kingdom in major hospitals in London, including the A&E department at Queen’s Hospital, Romford, London, as well as the Acute Medical Unit at Queen Elizabeth Hospital, Woolwich, London. She completed her specialty training in Endocrinology, Diabetes, and Metabolism in 2020 at the General Hospital of Athens "Evangelismos," where she gained extensive experience in a wide range of endocrinological cases. The hospital’s Endocrinology Department is a Diabetes Center and a Center of Expertise for Rare Endocrinological Diseases (Pituitary – Adrenal – Thyroid). During this training, she also attended the clinics for Gestational Diabetes, Andrology, and Infertility at the General Hospital "Elena Venizelou." Currently, Dr. Markou is an external associate of the Endocrinology Department at "Errikos Dynan Hospital Center." Additionally, in the academic year 2024-2025, she began her studies in the postgraduate program "Surgery of Endocrine Glands" at A.U.Th. and participates in research programs of the Department of Endocrine Gland Surgery at "Errikos Dynan" Hospital.

Rantavelas Traianos is an Endocrinologist - Diabetologist with many years of experience in the management and treatment of diseases across the entire spectrum of Endocrinology. He specialized at the Endocrinology Clinic of the General Hospital of Thessaloniki "Ippokrateio," the Endocrinology Clinic of the Anti-Cancer Hospital of Thessaloniki "Theageneio," the Endocrinology Clinic of the General Hospital of Thessaloniki "Agios Pavlos," and the outpatient clinics of the General Hospital of Thessaloniki "Papageorgiou."

The clinics are located in the city center of Edessa and in Aridaia, in comfortable and pleasant spaces, complying with all COVID-19 protection measures.

The clinics are fully equipped with the most modern and reliable medical devices.

At his private clinics, ultrasound examination of the thyroid gland is available, as well as ultrasound-guided fine needle aspiration (FNA) of thyroid nodules.

Kleio Xantziara is an Endocrinologist with a private practice in Goudi. She holds a PhD from the Medical School of the National and Kapodistrian University of Athens and is a graduate of the same institution. She holds a Bachelor of Arts in Psychology and Biology with a full scholarship from Harvard University. She is affiliated with the "Hygeia" and "Mitera" Hospitals. She specialized in Endocrinology at St. Luke’s and Roosevelt Hospitals in New York, as well as in the Endocrinology, Diabetes, and Metabolism department of the General Hospital of Athens "Evangelismos". Additionally, she has participated as a researcher in primary research on brain tumors, specifically apoptosis and clonality analysis, in the Neurosurgery Laboratory at Brigham and Women's Hospital in Boston. Finally, she has numerous scientific publications and is a member of various associations and scientific societies in Greece and abroad.

Tsoukala Xrysoula Md is an Endocrinologist - Diabetologist and maintains a private practice in Aigaleo. She is a graduate of the Medical School of the National and Kapodistrian University of Athens. Subsequently, she specialized in Pathology and then in Endocrinology, Diabetes, and Metabolism at the General University Hospital "Attikon" as well as at the Athens Children's General Hospital "Pan. & Agl. Kyriakou." Additionally, she has attended postgraduate courses in Endocrinology, Diabetes, and Metabolism. The physician has many years of clinical experience and is specialized in diabetes mellitus, thyroid and parathyroid glands, as well as in the management of obesity and metabolic disorders. Finally, she has participated in numerous scientific conferences both in Greece and abroad.

Katsogiannos Petros is an Endocrinologist – Diabetologist who maintains a private practice in Pallini while also collaborating with the private hospital "Hygeia." He is distinguished by his combined experience in clinical practice, research, and university education. He graduated from the Medical School of Semmelweis University and earned a Doctor of Medicine (PhD) degree from Uppsala University, with research work in the field of endocrinology. He has worked as a Senior Endocrinologist – Diabetologist at Uppsala University Hospital and currently serves as a Senior Consultant at Linköping University Hospital. In the past, he served for several years as a resident and then as a Consultant in the Department of Internal Medicine and Endocrinology at Uppsala University Hospital, gaining extensive experience in the diagnosis and treatment of thyroid diseases, diabetes mellitus, pituitary disorders, and osteoporosis. Combining clinical practice with research activity, Katsogiannos Petros is a scientist with an international orientation and a modern, evidence-based approach to patient care. He offers comprehensive diagnosis and treatment for endocrinological, diabetological, and metabolic diseases, thyroid gland disorders (hypothyroidism, hyperthyroidism, thyroid nodules, thyroid malignancy, Hashimoto's thyroiditis, thyroid and pregnancy), parathyroid diseases (hyperparathyroidism, hypocalcemia, vitamin D deficiency), osteoporosis, pituitary diseases, adrenal diseases, polycystic ovary syndrome, male hypogonadism, endocrine hypertension, type 1 diabetes mellitus (insulin pump, continuous glucose monitoring system) and type 2 diabetes as well as gestational diabetes with endocrinological disorders during pregnancy and the postpartum period, metabolic control – dyslipidemias, and obesity management.

Dr. Ilias Perogamvros, MD, PhD, is an Endocrinologist and Diabetologist, a top graduate of the University of Athens, Doctor, and Scientific Collaborator at the University of Manchester in the United Kingdom. After completing his specialization at one of the leading Endocrinology centers in the UK, Christie Hospital in Manchester, and in the historic and largest Endocrinology Clinic in Greece at the General Hospital of Athens "Evangelismos," he maintains a private practice in Athens (near the exit of the Panormou Metro station) and collaborates with Medifirst Marousi as the head of the Outpatient Endocrinology Clinic. He has numerous publications in the leading scientific journals in the field of Endocrinology and presentations in the USA, Canada, and the United Kingdom. Books to which he has contributed a significant number of chapters have been published by Oxford University Press and are distributed in Greek and international universities. Finally, the doctor is a member of the Board of Directors of the Onassis Foundation Fellows Association.

Kakoulidis Ioannis is an Endocrinologist - Diabetologist maintaining a private practice in Nea Ionia. He holds a degree from the Medical School of the National and Kapodistrian University of Athens and a Master's degree in "Research in Female Reproduction" from the Medical School of NKUA. He specialized in Endocrinology at the Department of Endocrinology, Diabetes, and Metabolism of the General Hospital - Maternity Hospital of Athens “Elena Venizelou.” During his specialization, he focused on Pregnancy Endocrinology and Andrology, and received training in thyroid ultrasound. He has participated in conferences both in Greece and internationally and has been actively involved in the design and implementation of prospective and retrospective studies in the Endocrinology department, which have been subsequently published or presented in national and international journals and conferences. In 2019, he was awarded by the Hellenic Endocrine Society with the I. Giannatos Award for Best Research Work in Clinical Endocrinology. His practice manages cases covering the entire spectrum of Endocrinology, specifically: Thyroid - Parathyroid Glands, Gestational Diabetes, and Pregnancy Endocrinology.

Theodoridou Tzouli is an Endocrinologist – Diabetologist with a private practice in Thessaloniki.

Her primary focus is weight loss and metabolic health in individuals who are tired of diets and restrictions — but do not see results.

Her approach is based on identifying the underlying causes that block the body — hormonal, metabolic, nutritional, and lifestyle-related — and creating personalized strategies that lead to effective outcomes.

Medical Education & Experience

She graduated from the Medical School of the State Academy of Saint Petersburg.

She has trained and worked in major hospitals in Thessaloniki (AHEPA, Papageorgiou, Theageneio, Agios Pavlos), gaining significant clinical experience across the full spectrum of endocrinology and metabolic diseases.

She combines contemporary endocrinology with nutrition (holder of a Nutritionist diploma).

Areas of Expertise

• Weight loss & metabolic balancing

• Thyroid disorders & ultrasound

• Diabetes mellitus & metabolic syndrome

• Hormonal disorders & women's health (menstrual cycle, pregnancy, menopause)

Her practice provides comprehensive medical assessment, enabling each patient to gain a clear understanding of their body and receive a targeted plan from the very first visit.

She caters to those who want to understand their body, invest in their health, and achieve lasting change.

Dr. Iliopoulou Amalia MD, MRCP is an Endocrinologist and Diabetologist, maintaining a private practice in Kolonaki. She graduated from the Medical School of the University of Athens, where she was admitted with a scholarship from the State Scholarships Foundation due to her excellent performance in the Panhellenic Examinations. She completed her entire specialty training in the United Kingdom, where she obtained qualifications in Endocrinology, Diabetes, and Internal Medicine. In England, she worked for 10 years, reaching the position of Director of Endocrinology at St James University Hospital in Leeds. Additionally, she had the honor of being elected a member of the Royal College of Physicians of London through examination (MRCP London). She returned to Greece at the end of 2013 and has been operating her private practice since 2014, while simultaneously serving as a Scientific Collaborator in the Endocrinology Department of Aretaieio Hospital. She regularly attends seminars and medical conferences in her field, primarily in the UK. Her specialization includes thyroid and parathyroid diseases, diabetes mellitus, obesity, and metabolism. Furthermore, she manages other conditions such as infertility, pituitary disorders, adrenal gland diseases, and polycystic ovary syndrome.

Mpoutsouris Konstantinos is an Endocrinologist with a private practice in Nea Smyrni. He holds a PhD from the Medical School of the National and Kapodistrian University of Athens, focusing on the influence of genes on the manifestation and treatment of obesity and type II diabetes mellitus. Additionally, he earned a medical degree from the Medical School of the University of Ioannina and possesses a license for ultrasonographic examination of endocrine glands. He has extensive experience in diabetes mellitus, thyroid disorders, hormonal imbalances, metabolism, and nutrition. The doctor believes that endocrinology is a continuously evolving science with new concepts and ideas emerging in the literature almost daily. In an era characterized by an overwhelming amount of scientific information, the endocrinologist must act as a filter of this knowledge, ensuring that patients receive simple and comprehensible information, but most importantly, appropriate treatment. Based on all the above, he considers himself capable of assisting each patient with any endocrine disorder, offering medical management tailored to each individual patient and utilizing state-of-the-art diagnostic equipment, thereby providing his patients with the best and most reliable diagnostic and therapeutic methods.

Η κ. Μοναστηριώτη Νικολέττα είναι Ενδοκρινολόγος-Διαβητολόγος και διατηρεί το ιδιωτικό της ιατρείο στη Νέα Κηφισιά. Εχει πραγματοποιήσει την εξειδίκευση της στην Υπερηχογραφίκη εκτίμηση παθήσεων του θυρεοειδούς αδένα, στο αντικαρκινικό νοσοκομείο Πειραιά ''Μεταξά'' και έλαβε την άδεια εκτέλεσης υπερήχων θυρεοειδούς αδένα. Είναι πτυχιούχος της Ιατρικής Σχολής του Πανεπιστημίου Πατρών, απ' όπου και αποφοίτησε το 2013. Ειδικεύτηκε στην Ενδοκρινολογία στη Μονάδα Ενδοκρινολογίας και Κέντρο Μεταβολισμού και Σακχαρώδους Διαβήτη στο Γενικό Νοσοκομείο Αθηνών ''Γεώργιος Γεννηματάς'' και στην Παθολογική κλινική του Γενικού Νοσοκομείου Κέρκυρας. Κατά τη διάρκεια της ειδικότητας της, εκπαιδεύτηκε, επίσης, στο τμήμα Κλιμακτηρίου και Εμμηνόπαυσης στη Β' Μαιευτική και Γυναικολογική Κλινική Πανεπιστημίου Αθηνών, στις Ενδοκρινικές Παθήσεις κατά την Κύηση στο Ενδοκρινολογικό Τμήμα ΓΝ '' Έλενα Βενιζέλου'' και στην Παιδοενδοκρινολογία στο Ενδοκρινολογικό τμήμα Αύξησης και Ανάπτυξης, Γ.Ν.Π.Α ''Παναγιώτη & Αγλαΐας Κυριακού''. Έχει ολοκληρώσει με επιτυχία τον κύκλο μαθημάτων του Προγράμματος Μεταπτυχιακών σπουδών '"Έρευνα στη γυναικεία αναπαραγωγή'' της Ιατρικής Σχολής του Εθνικού & Καποδιστριακού Πανεπιστημίου Αθηνών. Διατελεί μέλος του Ιατρικού Συλλόγου Αθηνών και της Ελληνικής Ενδοκρινολογικής Εταιρείας. Έχει συμμετάσχει σε πληθώρα ελληνικών και διεθνών συνεδρίων και σεμιναρίων Ενδοκρινολογίας και Σακχαρώδους Διαβήτη με συνεχή ενημέρωση για τις εξελίξεις της επιστήμης στον τομέα της. Έχει εκπαιδευτεί και διαθέτει μεγάλη κλινική εμπειρία σε μεγάλο εύρος ενδοκρινολογικών παθήσεων, συμπεριλαμβανομένων του σακχαρώδη διαβήτη, των νοσημάτων θυρεοειδούς και παραθυρεοειδών αδένων, της οστεοπόρωσης και των νοσημάτων του μεταβολισμού ασβεστίου, των διαταραχών εμμήνου ρύσεως και εμμηνόπαυσης, του υπογοναδισμού, των νοσημάτων των επινεφριδίων και της υπόφυσης, της ενδοκρινικής υπέρτασης, της παχυσαρκίας, των διαταραχών λιπιδίων και των ενδοκρινοπαθειών κατά την κύηση. Στο ιατρείο της αντιμετωπίζει εξατομικευμένα και με ενσυναίσθηση τον κάθε ασθενή, με σκοπό την παροχή υψηλού επιπέδου υπηρεσιών.

Ο Τσιτσιμπής Αναστάσης MD, MSc είναι Στρατιωτικός ιατρός - Ενδοκρινολόγος, επιμελητής του ενδοκρινολογικού τμήματος του 401 ΓΣΝΑ, υπηρετεί στο Επίλεκτο Τμήμα Αλεξιπτωτιστών των Ειδικών Δυνάμεων και διατηρεί ιδιωτικό ιατρείο στην πόλη της Λαμίας.

Αποφοίτησε από την Στρατιωτική Σχολή Αξιωματικών Σωμάτων (ΣΣΑΣ) και την Ιατρική Σχολή του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης και ολοκλήρωσε την ειδικότητα της Ενδοκρινολογίας στο Γενικό Νοσοκομείο Ερυθρός Σταυρός «Κοργιαλένειο–Μπενάκειο».  Κατά την διάρκεια της ειδικότητας διακρίθηκε με το Ά Βραβείο σε Πανελλήνιο διαγωνισμό για ειδικευόμενους ενδοκρινολογίας.

Τιμήθηκε από την Ελληνική Ενδοκρινολογική Εταιρεία με υποτροφία και εκπαιδεύτηκε στον Σακχαρώδη Διαβήτη και την παχυσαρκία στο Harvard University, Joslin Diabetes Center , ένα από τα κορυφαία κέντρα παγκοσμίως στον τομέα του διαβήτη.

Επιπλέον, κατέχει Μεταπτυχιακό Δίπλωμα (MSc), με άριστα, στην Υπολογιστική Ιατρική και Βιοπληροφορική από το Πανεπιστήμιο Θεσσαλίας, έχοντας ερευνητικό έργο πάνω στις «Ενδοκρινικές ανεπιθύμητες ενέργειες της ανοσοθεραπείας στον καρκίνο», που είναι από τις πιο σύγχρονες και απαιτητικές κατευθύνσεις της Ιατρικής σήμερα.

Στην καθημερινή κλινική πράξη δίνει έμφαση στην ολιστική προσέγγιση, στην εξατομίκευση της θεραπείας, την αναλυτική ενημέρωση του ασθενούς και τη δημιουργία ενός ασφαλούς περιβάλλοντος συνεργασίας. Στόχος του είναι η ουσιαστική βελτίωση της υγείας και της ποιότητας ζωής κάθε ασθενούς, μέσα από σύγχρονες θεραπευτικές επιλογές και συνεχή επιστημονική ενημέρωση.

Η Λάσπα Έλενα είναι Ενδοκρινολόγος - Διαβητολόγος και διατηρεί το ιδιωτικό της ιατρείο στο Χαλάνδρι. Μέσω πανελληνίων εξετάσεων εισήχθη στην Ιατρική Σχολή Αθηνών το 1990. Μετά από γραπτό διαγωνισμό έλαβε και διατήρησε για όλη τη διάρκεια των σπουδών την υποτροφία του κληροδοτήματος "Αντωνίου Παπαδάκη". Μετά την αποφοίτηση της τον Ιούλιο του 1996 εκπλήρωσε την υπηρεσίας υπαίθρου, στην διάρκεια της οποίας πήρε απόσπαση για τις εφημερίες της στην μονάδα εμφραγμάτων του Γενικού Νοσοκομείου Πρεβέζης. Εν συνεχεία ειδικεύτηκε για 2 έτη στην παθολογία ως προαπαιτούμενη εκπαίδευση για την κύρια ειδικότητα. Εξειδικεύθηκε στην ειδικότητα της Ενδοκρινολογίας στο Πανεπιστημιακό Νοσοκομείο Ιωαννίνων υπό τη διεύθυνση του καθηγητή Α.Τσατσούλη. Ολοκλήρωσε το τελευταίο τμήμα της την ειδικότητας στο St.Mary’s Hospital του Λονδίνου, όπου εξειδικέυθηκε στο υπερηχογράφημα τραχήλου και στις καθοδηγούμενες υπερηχογραφικά παρακεντήσεις όζων θυρεοειδούς αδένα. Παράλληλα με την κλινική της δραστηριότητα στο Λονδίνο, συμμετείχε σε ερευνητικά προγράμματα μελέτης της μεταβλητότητας παραγόντων κινδύνου για την εμφάνιση διαταραχής ανοχής γλυκόζης και αθηροσκληρωτικής νόσου. Μετά το πέρας της ειδικότητας παρέμεινε επιστημονικά ενεργή με την συμμετοχή της σε έρευνες του Πανεπιστημιακού Νοσοκομείου Ιωαννίνων για τον καρκίνο του θυρεοειδούς, για τις ανάγκες της οποίας ανέλαβε μεγάλο αριθμό παρακεντήσεων όζων θυρεοειδούς. Έχει συμμετάσχει ως κλινικός ερευνητής στην Διεθνή κλινική μελέτη Lantus HOE901/3505: ATLANTUS. Επίσης συμμετείχε ως ομιλητής σε πλήθος ελληνικών και διεθνών συνεδρίων. Διεθνή επιστημονικά περιοδικά έχουν φιλοξενήσει δημοσιεύσεις της. Το 2015 έγραψε το κεφάλαιο "Παραθυρεοειδείς αδένες και μεταβολισμός των οστών" στο διαδικτυακό πόνημα "Σύγχρονο εγχειρίδιο Ενδοκρινολογίας". Το 2016 έγραψε το κεφάλαιο "Pseudohypoparathyroid States" στην Εγκυκλοπαίδεια Ενδοκρινικών Νοσημάτων (Encyclopedia of Endocrine Diseases). Το 2019 ολοκλήρωσε το εκπαιδευτικό πρόγραμμα «Health Coach» του Κέντρου Επιμόρφωσης και Δια Βίου Μάθησης του Εθνικού Καποδιστριακού Πανεπιστημίου Αθηνών. Είναι ένα πρόγραμμα το οποίο προσφέρει γνώσεις και εφόδια «προπονητή υγείας» ,ώστε ο ιατρός με μοντέλα ειδικής προσέγγισης και μεθοδολογίας να ενδυναμώσει τον κάθε άνθρωπο να αλλάξει βλαπτικές συνήθειες και συμπεριφορές και να επιτύχει τους στόχους υγείας που θέτει. Είναι μέλος της Ελληνικής Ενδοκρινολογικής Εταιρίας και της Ελληνικής Εταιρίας Μελέτης Μεταβολισμού των Οστών. Μετά από εξετάσεις έγινε δεκτή ως μέλος της Ευρωπαϊκής Εταιρίας Ενδοκρινολογίας, Διαβήτη και Μεταβολισμού (Fellow of the European Board of Endocrinology, Diabetes and Metabolism).

Prokopiou Maria is an Endocrinologist with private practices in Mavili Square and Gerakas. She holds a postgraduate diploma in healthcare management from the Hellenic Open University and a degree from the Medical School of the National and Kapodistrian University of Athens. She specialized in Endocrinology at the Endocrinology, Metabolism and Diabetes Unit of the 1st Internal Medicine Clinic of the National and Kapodistrian University of Athens, at the General Hospital "Laiko." Additionally, she has attended Medical Acupuncture seminars at the AcuScience International Postgraduate Acupuncture Center. She possesses valuable professional and clinical experience in the diagnosis, prevention, and therapeutic management of endocrine gland disorders, specifically affecting the thyroid, parathyroids, pancreas, ovaries, testes, adrenal glands, pituitary gland, and hypothalamus, as well as diabetes mellitus and obesity. She also manages cases such as metabolic bone diseases - osteoporosis, female and male endocrinology, and hypertension. Finally, she is a member of the Athens Medical Association, the Hellenic Diabetes Association, and the European Society of Endocrinology.

Dr. Paparodis Rodis, MD, is an Endocrinologist and maintains a private practice in Patras. He is a Visiting Professor of Endocrinology and a Visiting Professor at the Center for Diabetes and Endocrinology Research (CEDER) at the University of Toledo. The aim of the Endocrinology, Diabetes, and Metabolism clinic of Dr. Rodis D. Paparodis is to provide tertiary care to patients, as delivered during the physician’s long-standing academic career in the United States of America. The physician has received multiple honorary distinctions for his research work, both from The Endocrine Society and the American Association for Cancer Research.

Dr. Kiortsis Dimitrios, Endocrinologist - Diabetologist, is a Professor at the Medical School of the University of Ioannina. He maintains private clinics in Athens and Ioannina. He specialized in Paris at the university hospitals Pitie-Salpetriere, Saint Louis, Hotel Dieu, Trousseau, and Cochin. He holds a three-year diploma in Endocrinology and Metabolic Diseases (DU Paris V). He earned his PhD through collaboration between the Universities of Paris (Paris VI) and Athens. He has 35 years of experience across the full spectrum of endocrinological disorders, with particular expertise in obesity and metabolic diseases. He is a European-certified specialist and trainer of new physicians in obesity (European Scope). He has served as President of the Hellenic Medical Society for Obesity and is currently President of the Hellenic Society of Metabolism, Nutrition, and Well-being. His original research work includes over 200 publications in international journals, and he has authored numerous chapters in international and Greek books. His work has received multiple awards. He continues his research in collaboration with leading institutions in Europe and the USA. His clinic offers a fully personalized approach to all endocrinological disorders, with an emphasis on the contemporary therapeutic management of metabolic diseases and obesity. Combining academic research with extensive clinical experience, his goal is to improve patient quality of life through scientifically substantiated knowledge.