[State of health among students of prolonged-day schools in the city of Leningrad].
D000293:Adolescent; D002648:Child; D003479:Curriculum; D006128:Growth; D006262:Health; D006801:Humans; D009017:Morbidity; D012426:Russia; D012574:Schools; D013334:Students; D014504:Urban Health
Sostoianie zdorov'ia uchashchikhsia shkol prodlennogo dnia goroda Leningrada.