Reply to technical comment on: Güller et al. Lower hospital volume is associated with higher mortality after oesophageal, gastric, pancreatic and rectal cancer resection

Guebeli N, Warschkow R, Ackermann C, Schmied B, Cerny T, ess s. Reply to technical comment on: Güller et al. Lower hospital volume is associated with higher mortality after oesophageal, gastric, pancreatic and rectal cancer resection. Swiss Med Wkly 2018; 148:w14583.