1. Department of Colorectal Surgery, Hospital Universitário de Brasília, Brasilia 70840-901, Brazil
2. Hospital Moinhos de Vento, Porto Alegre 90035-000, Brazil
3. IRCAD America Latina, Surgical Staff Americas Medical Services, Rio de Janeiro 22775-001, Brazil
4. Department of Colorectal Oncology Surgery, Barretos Cancer Hospital, IRCAD America Latina, São Paulo 14784-400, Brazil
5. Department of Surgery, Colorectal Service, School of Medicine, Federal University of Goias, Goias 74605-050, Brazil
6. School of Medicine, Centro Universitário do Planalto Central, Brasília 72445-020, Brazil
7. Hospital Israelita Albert Einstein, São Paulo 05652-900, Brazil