Güller U, Warschkow R, Ackermann CJ, Schmied BM, 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 [Internet]. 2018 Jan. 4 [cited 2024 Apr. 23];148(0102):w14583. Available from: https://smw.ch/index.php/smw/article/view/2429