Rectal sparing approach after preoperative radio- and/or chemo-therapy (resarch) in patients with rectal cancer: preliminary analysis of an observational multicentre prospective study. Issue 2 (February 2020) - Palatucci, Valeria; Spolverato, Gaya; Pucciarelli, Salvatore; De Paoli, Antonino; Maretto, Isacco; Perin, Alessandro; Bigon, Mariasole; Guerrieri, Mario; Muratore, Andrea; Bianco, Francesco; Vespa, Domenico; Morpurgo, Emilio; et al.