title: [Early diagnosis and problems in classification of pulmonary hypertension].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D006801:Humans; D006976:Hypertension, Pulmonary / Q000145:classification* / Q000175:diagnosis; D008875:Middle Aged
vernacular_title: Ranniaia diagnostika i nekotorye voprosy klassifikatsii legochnoĭ gipertonii