2013 WSES guidelines for management of intra-abdominal infections - Sartelli, Massimo; Viale, Pierluigi; Catena, Fausto; Ansaloni, Luca; Moore, Ernest; Malangoni, Mark; Moore, Frederick A.; Velmahos, George; Coimbra, Raul; Ivatury, Rao; Peitzman, Andrew; Koike, Kaoru; et al. (World Journal of Emergency Surgery, 2013)