Study of the patency of different peritoneal drains used prophylactically in bariatric surgery - Salgado Júnior, Wilson; Macedo Neto, Marcelo Martins; Santos, José Sebastião dos; Sankarankutty, Ajith Kumar; Ceneviva, Reginaldo; Castro e Silva Júnior, Orlando de (World Journal of Gastroenterology, 2009)