• 2023: CERNATEC, Research Center of Complementary Therapies, University of Sassari. Postgraduate Studies in “Clinical Hypnosis in parasympathetic tone”
• 2021-2022: National Kapodistrian University of Athens, Department of Medicine. Postgraduate Studies in Immunology and Autoimmune Systemic Diseases and Rheumatic Diseases.
• 2020-2021: National Kapodistrian University of Athens, Department of Medicine. Postgraduate Studies in Neurosurgery, Functional & Topographic Neuroanatomy and Nervous System Syndromes.
• 2016-2019: National Kapodistrian University of Athens, Department of Medicine. MSc Neurotology, Study of the physiology and pathology of hearing and  vestibular, Diagnostic investigation, treatment and rehabilitation of hearing and balance pathologies, Specialized knowledge in biophysics, physiology, genetics and molecular biology.
• 2019: National Kapodistrian University of Athens, Department of Medicine. MSc Acoustics and Hearing, Study of the physiology and pathology of hearing.Diagnostic investigation, treatment and rehabilitation of hearing pathologies and tinnitus, Specialized knowledge in biophysics, physiology, genetics, molecular biology and cognitive sciences.
• 2013-2015: Faculty of Medicine Dimocritus University of Thrace, MSc Rhinology, Rhinosurgery, Diseases of nasal cavity and paranasal sinuses, Allergic Disease, Obstructive sleep apnea, Nasal and Paranasal surgery, Endoscopic Sinus Surgery (FESS), Septo-Rhinoplasty and Septoplasty
• 2014: 50th Graz Course on FESS / Rhinosurgery and Basics of Septo-Rhinoplasty Dept. of General ENT, Karl-Franzens-University Graz
• 2013:15th Endoscopic Ear and Skull base Surgery, Tympanoplasty, Atticotomy, Mastoeidectomy, Ossiculoplasty, National Kapodistrian University of Athens
• 2012:11th Workshop Endoscopic Nasal and Sinus Surgery, 1st ENT Clinic, University of Athens
• 2011: Postgraduate Training in Stomatology, Andreas Syggros Hospital, Stomatology Clinic
• 2012-2013: Training in Neurosurgery, G. Gennimatas General Hospital, Athens
• 2013-2014: Training in Plastic Surgery, Rhinoplasty, Auriculoplasty, Blepharoplasty, Facial Plastic Surgery, 401 Military Hospital of Athens
• 2013: 21st Stuttgart Advanced Course for Functional & Aesthetic Rhinoplasty, Center of Plastic Surgery Department for Facial Plastic Surgery Marienhospital Stuttgart
• 2013: 11th RHINO®-Workshop Kassel, Germany
• 2013: Internationally recognized Diploma in Cosmetic Acupuncture 1st & 2nd Level, Prof. Radha Thambirajah, China
• 2014: Diploma for Acupuncture in Pain Therapy and Obesity, Prof. Zhong Qiangwei of University Tianjin, Peking
• 2015: Diploma in Auricular Neuromodulation, Diagnosis and Therapy of Stress, Anxiety, Psycho-emotional Disorders, Insomnia, Dr Giancarlo Bazzoni, Medical International Society of Auricular Acupuncture, G.S.A.T.N Italy

• 2007- 2008 General Physician, Medical Centre, Polichnitos, Mytilene
• 2008-2009 General Surgeon, General Hospital of Mytilene
• 2009-2011 Head and Neck Surgeon, General Hospital «Bostaneio»
• 2011-2013 ENT Surgeon, Diplomat in Biomedical Acupuncture, General Hospital of Thoracic Disease, Athens
• 2012-2013 Neurosurgery, G. Gennimatas General Hospital, Athens
• 2013-2014 Plastic Surgery, 401 Military Hospital of Athens
• Scientific Medical Director of ΕΥiasis.

Efthymiou Ch, Stoumbos G, Theodorou P. “Hereditary angioedema.” Hellenic Otorhinolaryngology Vol.32 Issue 2 (E-Journal) 2011

Ch Efthymiou, G Stoumbos, P Theodorou. “Pyogenic granuloma of the nasal cavity during pregnancy. Case presentation” Hellenic Otorhinolaryngology Vol.32 Issue 1 (E-Journal) 2011

Efthymiou C, Zagora E. “A further exploration of patients with IBS in rural Crete.” Rural and Remote Health 6 (online), 2006. 626

Ch Efthymiou, G Stoumbos, P Theodorou. “Pyogenic granuloma of the nasal cavity during pregnancy.Case presentation” 16th Panhellenic Otorhinolaryngology Conference. 2011

C Efthymiou, D Giannatos, V Kapsi, “Csf Rhinorrhea and surgical repair. Case report.” 16th Pan-Hellenic ENT congress. 2011

C Efthymiou, D Giannatos, A Maarouf, V Kapsi, “Comparison of tympanoplastic surgical techniques. Our experience, indications, advantages and disadvantages.” 16th Pan-Hellenic ENT congress 2011.

C Efthymiou, A Mina, P Sotiropoulos, “Tuberculosis of the head and neck.” 16th Pan-Hellenic ENT congress 2011.

T. Vasilopoulos, C. Efthymiou, A. Papaioannou, A. Zariba, G. Arseni, A.FilalIthis, C. Lionis. “A medical students training in COPC:experiences gained from rural Crete.” European General Practice, Research Network. Kavala. 2006.

• Athens Medical Association

• Pan-Hellenic Medical Association of Acupuncture

• Hellenic Council of Medical Acupuncture

• ICMART – International Council of Medical Acupuncture and Related techniques

• Hellenic Association of Acupuncture and Chinese Medicine

• Member of the Editorial Board, Scientific Assistant
Primary Health Care Journal

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