[1
]
Department of Obstetrics and Gynecology, Lucile Packard Children's Hospital at Stanford
University, Stanford, CA, USA.
[2
]
Department of Obstetrics and Gynecology, Kaiser Permanente Northern California, Oakland
Medical Center, Oakland, CA, USA.
[3
]
Department of Pediatrics, Lucile Packard Children's Hospital at Stanford University,
Stanford, CA, USA.
[4
]
Department of Anesthesiology, Stanford University Medical Center, Stanford, CA, USA.