1. University of Pittsburgh Medical Center; Pediatrics Division of Newborn Medicine; 300 Halket Street Pittsburgh Pennsylvania USA 15219
2. St Charles Health Care; Division of Neonatology; 2500 NE Neff Rd Bend Oregon USA 97701
3. University of Vermont Medical Center; Division of Neonatal-Perinatal Medicine; 111 Colchester Avenue Burlington Vermont USA 05401