For citations:
Kurdup M.K., Galitskaya M.G., Davydova I.V., Fisenko A.P., Basargina E.N., Makarova S.G. Pneumococcal Vaccination of Children with Chronic Heart Disease. Title. 2022;21(3):17-21. (In Russ.) https://doi.org/10.31550/1727-2378-2022-21-3-17-21