For citations:
Podoluzhnyi V.I., Startsev A.B., Radionov I.A. Epidemiology and treatment of perforated duodenal ulcer in Kemerovo Region. Fundamental and Clinical Medicine. 2020;5(2):67-71. (In Russ.) https://doi.org/10.23946/2500-0764-2020-5-2-67-71