World society of emergency surgery study group initiative on timing of acute care surgery classification (TACS) - Kluger, Yoram; Ben-Ishay, Offir; Sartelli, Massimo; Ansaloni, Luca; Abbas, Ashraf E.; Agresta, Ferdinando; Biffi, Walter L.; Baiocchi, Luca; Bala, Miklosh; Catena, Fausto; Coimbra, Raul; Cui, Yufeng; et al. (World Journal of Emergency Surgery, 2013)