University of São Paulo, Brazil
Complejo Médico Policía Federal Hospital Churruca-Visca. CABA. Argentina
University "La Sapienza" , Switzerland
Hospital de Neurologia Santa Mônica, Goiânia, Brazil
Mohammed V University, Kingdom of Morocco
GASTER – PLARIS- Colsubsidio Bogotá, Colombia
Airlangga University, Indonesia
University of L'Aquila, Italy
University de Ciencias Biomédicas Austral, Argentina
Faculty of Medicine University, Indonesia
Clinique Rhéna-SOS, Brazil
Alexandria University, Egypt
Metropolitan Hospital, Grecce
Department of Clarunis, University of Basel, Switzerland
Pediatric Surgeon, Transplant Surgeon Ukraine
Centre Hospitalier Universitaire UCL Namur - Site de Sainte-Elisabeth, Belgique
Scientific director of HAV Academy, Colombia
Department of Anesthesiology and Perioperative Medicine (SMD), USA
University Hospital of Caracas, Venezuela
Department of Otolaryngology- Head & Neck Surgery, Bangladeshy
International Islamic University of Malaysia
Campo Real University, Brazilian
Department of Pediatric Surgery, All India Institute of Medical Sciences, Jodhpur, India
University of Valparaíso, Chile
Kayseri City, Turkey
Department of Otolaryngology, Azerbaijan.
Tizi Ouzou University, Algeria
Damascus University, Syria
Hospital San Juan de Dios in Santiago, Chile
Menoufia University (Egypt) and Reflect Center (Saudi Arabia)
Assistant Professor at Lady Reading Hospital in Peshawar, Pakistan
Department of Bagrationovsk, Russia
University of Thessaloniki, Greece
Kayseri University, Turkey
Tower Health Reading Hospital, West Reading, PA, USA
Basildon University NHS Hospital, United Kingdom
Anesthesiology Department, Sanatorium Allende, Córdoba, Argentina
General Surgery, Paraguay
Bogomolets National University, Ukraine
Ilyinskaya Hospital, Moscow, Russia
Damascus University, Syria.
