For citations:
Sheptulin A.A., Kardasheva S.S., Kurbatova A.A. Peptic ulcer disease: changes it has undergone over the past 50 years. Clinical Medicine (Russian Journal). 2020;98(8):583-587. (In Russ.) https://doi.org/10.30629/0023-2149-2020-98-8-583-587