Güller, U., Warschkow, R., Ackermann, C.J., Schmied, B.M., Cerny, T. and Ess, S. 2018. 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 Medical Weekly. 148, 0102 (Jan. 2018), w14583. DOI:https://doi.org/10.4414/smw.2018.14583.