For citations:
Shalygina M.V., Rodionovskaya S.R., Vinnikova V.G., Torosyan G.G., Nikishina I.P. Henoch-Schonlein disease progression in 9-year-old patient who has undergone new coronavirus infection COVID-19 (clinical observation). Russian Pediatric Journal. 2022;3(1):340. (In Russ.)