1 From the Department of Pediatrics (S.L.B.), Stanford University, Palo Alto, CA; and Department of Neonatology (L.S.V.), Leiden University Medical Center (LUMC), the Netherlands. soniab1@stanford.edu.
2 From the Department of Pediatrics (S.L.B.), Stanford University, Palo Alto, CA; and Department of Neonatology (L.S.V.), Leiden University Medical Center (LUMC), the Netherlands.