Affiliation: | Department of Pediatrics, Division of Immunogenetics, University of Pittsburgh School of Medicine, Children's Hospital of Pittsburgh, Pennsylvania, USA;Pediatric Clinic University of Pittsburgh, Pennsylvania, USA;Institute of Transfusiology University of Pittsburgh, Pennsylvania, USA;Clinic of Endocrinology, Faculty of Medicine, University of Skopje, Former Yugoslav Republic of Macedonia University of Pittsburgh, Pennsylvania, USA;Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pennsylvania, USA |