GÜLLER, U.; WARSCHKOW, R.; ACKERMANN, C. J.; SCHMIED, B. M.; CERNY, T.; ESS, S. Lower hospital volume is associated with higher mortality after oesophageal, gastric, pancreatic and rectal cancer resection. Swiss Medical Weekly, [S. l.], v. 147, n. 2930, p. w14473, 2017. DOI: 10.4414/smw.2017.14473. Disponível em: https://smw.ch/index.php/smw/article/view/2335. Acesso em: 30 mar. 2023.