Fudan University Cancer Hospital, Shanghai, Shanghai, China
Fudan University Shanghai Cancer Center, Shanghai, Shanghai, China
Iran, Sari, Mazandaran, Iran, Islamic Republic of
Universitätsklinikum Leipzig, Leipzig, Germany
Catharina Hospital Eindhoven, Eindhoven, Brabant, Netherlands
Zuyderland Medical Center, Heerlen, Limburg, Netherlands
Maastricht University Medical Center, Maastricht, Limburg, Netherlands
Fudan University Shanghai Cancer Center, Shanghai, Shanghai, China
The University of Chicago, Chicago, Illinois, United States
Northwestern University, Chicago, Illinois, United States
Sichuan University West China Hospital, Chengdu, Sichuan, China
Hospital de Gastroenterologia Udaondo Ciudad de Buenos Aires, Buenos Aires, Argentina
Hospital Ramos Mejia: Hospital General de Agudos Dr. Jose Maria Ramos Mejia, Buenos Aires, Argentina
Hospital Italiano de Buenos Aires, Buenos Aires, Argentina