title: XXXIV Annual meeting of the Association for European Paediatric Cardiology, Sofia, 19-22 May 1999. Abstracts.
mesh_terms: D000293:Adolescent; D002309:Cardiology; D002318:Cardiovascular Diseases; D002648:Child; D002675:Child, Preschool; D005260:Female; D005315:Fetal Diseases; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D011247:Pregnancy