1. University of Rochester; Pediatrics; Dept of Pediatrics (Neonatology), Box 651 601 Elmwood Ave Rochester NY USA 14642
2. Huddinge Hospital; Neonatal Unit; Huddinge Sweden 14186
3. Golisano Children's Hospital at Strong; Pediatrics; Box 777 601 Elmwood Avenue Rochester USA 14642
4. University of Vermont; Division of Neonatal-Perinatal Medicine; Fletcher Allen Health Care, Smith 552A 111 Colchester Avenue Burlington Vermont USA 05401