For citations:
Panin S.I., Suvorov V.A., Bykov A.V., Kovalenko N.V., Postolov M.P., Bublikov A.E., Mikhin E.S., Linchenko A.A. Prognostic role of comorbid status in estimation of surgical treatment results in patients with perforated ulcer. Grekov's Bulletin of Surgery. 2022;181(3):20-27. (In Russ.) https://doi.org/10.24884/0042-4625-2022-181-3-20-27