Barnsley Hospital NHS Trust
United Kingdom
Ent department, Infermi Hospital
Italy
Humanitas Mater Domini Clinical Institute
Italy
University of Palermo
Italy
Seville University
Spain
University of Sao Paulo
Brazil
Dalian Medical University
China
Affiliated Hospital of Chengdu University
China
Yiwu hospital of Wenzhou medical university
China
Changhua Christian Hospital
Taiwan
Daping Hospital, Army Medical University
China
Cairo University
Egypt
Emergency Clinical Hospital, Bucharest
Romania
Dalian Medical University
China
Dragisa Misovic Hospital and Institute of Surgery
Serbia
Soba University Hospital
Sudan
Agricultural Technology Research Institute
Taiwan
Semey State Medical University
Kazakhstan
Cairo University
Egypt
University of Nis
Serbia
University of Campania
Italy
Saglik Bilimleri University
Turkey
Tanta University
Egypt
European Institute of Oncology
Italy
Minia university hospital
Egypt
Federal University of Rio Grande do Sul
Brazil
Minia university hospital
Egypt
4th Military Teaching Hospital
Poland
Assiut University
Egypt
Ayursundra Superspeciality Hospital
India
Bezmialem Vakif University
Turkey
Asian Institute of Gastroenterology
India