1. University of Texas Southwestern Medical Center at Dallas; Neonatal-Perinatal Medicine; 5323 Harry Hines Boulevard Dallas Texas USA 75390-9063
2. University of Texas Southwestern at Dallas; Division of Neonatal-Perinatal Medicine; 5323 Harry Hines Boulevard Dallas Texas USA 75390-9063
3. University of Vermont; Division of Neonatal-Perinatal Medicine; Fletcher Allen Health Care, Smith 552A 111 Colchester Avenue Burlington Vermont USA 05401