Department of Thoracic Surgery; Military Medical Academy, Sofia, Bulgaria

Chairmen of Bulgarian Association of Young Surgeons

Head of Breast Unit, Department of Thoracic Surgery, Military Medical Academy, Sofia, Bulgaria

Assistant in Clinic of Pediatric Diseases; PhD of Dermatology; UMHAT "Georgi Stranski", Pleven, Bulgaria;

Vice Chairman of Bulgarian Association of Young Surgeons

Head of Clinic of Endoscopic Endocrine Surgery and Coloproctology, Military Medical Academy, Sofia, Bulgaria

Albany Medical College, Albany, NY; University of Pittsburgh Medical Center, Pittsburgh, PA, USA

Kasr AlAiny Faculty of Medicine, Cairo, Egypt

Klinikum rechts der Isar, II. Medizinische Klinik, Molekulare Gastroenterologie, München, Germany

Laboratory of Atherosclerosis Research,Department of Cardiology,                   Democritus University of Thrace, Alexandroupolis, Greece 

Medical University of Sofia, Bulgaria.

Medical University of Sofia, Bulgaria

Bulgarian Association of Young Surgeons

Clinic of Endoscopic Endocrine Surgery and Coloproctology,

Military Medical Academy, Sofia, Bulgaria

Center of Transfusional Hematology,

Military Medical Academy of Sofia, Bulgaria

Obstetrics & Gynecology Clinic, Medical University of Pleven, Bulgaria

Department of Medical Biology, Medical University of Plovdiv, Bulgaria

Head of General Surgery Clinic, Military Medical Academy, Sofia, Bulgaria

Head of Clinic of Dermatology, Medical University of Pleven, Bulgaria

Head of Clinic of Pathology, Medical University of Pleven, Bulgaria

Head of Clinic of Medical Oncology, Military Medical Academy of Sofia, Bulgaria

Head of Clinic of Pulmonology, Military Medical Academy of Sofia, Bulgaria

Head of Department of Neurosurgery, Tokuda Hospital Sofia, Bulgaria

Department of Plastic Surgery,Military Medical Academy, Sofia, Bulgaria

Head of Clinic of Psychiatry, Military Medical Academy of Sofia, Bulgaria

Department of Thoracic Surgery, Military Medical Academy, Sofia, Bulgaria

Division of Orthopedics and Trauma Surgery, University of Perugia, Santa Maria della Misericordia Hospital, Perugia, Italy.

General Surgery Department, Università degli Studi di Perugia, Perugia, Italy

Numune Training and Research Hospital, Ankara, Turkey

Coloproctology Unit,

Parc Tauli University Hospital, Barcelona, Spain

Head of Clinic of Pediatric Cardiac Surgery, Universitäts klinikum Heidelberg, Germany

Dicle University, Turkey

European Medical Center, Breast Center, Moscow, Russia

Clinic of Anaesthesiology, Herz und Kreislaufszentrum Rotenburg, Germany

Clinic of Cardiac Surgery, Prague, Czech

General Surgery, Harlem Hospital Center, Columbia University, New York, USA

Department of GI Surgery, Command Hospital (WC), Chandimandir, Haryana, India