[Investigation on incidence of virus myocarditis in children (author's transl)].
D002648:Child; D002675:Child, Preschool; D002681:China; D004452:Echocardiography; D004562:Electrocardiography; D006801:Humans; D009205:Myocarditis / Q000175:diagnosis / Q000453:epidemiology*; D012621:Seasons; D014777:Virus Diseases / Q000175:diagnosis / Q000453:epidemiology*