TY - JOUR T1 - Comparison of prevalence H. pylori infection among children of St.-Petersburg, Russia at present JF - Helicobacter DO - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=ISI:000486077700201 AU - Svarval A., Y1 - 2022-08-31 UR - https://pasteur.elpub.ru/publication/1678 N2 -