Gakis Konstantinos is a Pulmonologist - Phthisiologist military physician and maintains a private practice in Larissa. He holds a degree from the Medical School of the Aristotle University of Thessaloniki and is a graduate of the Military School of Corps Officers (SSAS). He trained in Internal Medicine at the 2nd Internal Medicine Clinic of the 251 Air Force General Hospital, and specialized in Pulmonology - Phthisiology at the General Chest Diseases Hospital of Athens "Sotiria." Additionally, he specialized in Sleep Medicine at the Sleep Disorders Center of the University Pulmonology Clinic of Larissa, for which he received certification through examinations in 2023. He served as a consultant at the Pulmonology Clinic of the 251 Air Force General Hospital and was the scientific lead physician of the Sleep Disorders Laboratory of the 404 General Hospital of Larissa (2017-2025). Finally, as part of his continuous professional development, he participates in numerous seminars and conferences and is a member of the Larissa Medical Association, the Hellenic Respiratory Society, the Hellenic Sleep Society, as well as the European Respiratory Society.