title: [Pediatric Oncology Conference in observance of the 25th anniversary of the Polish Pediatric Leukemia and Lymphoma Study Group. May 26-28, 1999. Gdansk, Poland].
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008495:Medical Oncology; D009369:Neoplasms