Simone Bd, Catena F, Saverio SD, Sartelli M, Abu-Zidan FM, Podda M, Biffl WL, Ansaloni L, Coccolini F, Moore EE, Kluger Y, Gomes CA, Agresta F, Chouillard E. Risk factors for necrotic cholecystitis during the COVID-19 pandemic: the ChoCO-WSES prospective collaborative study’s experience. Turk J Surg. 2021;37(4):387-393.