Southern California Kaiser Permanente Medical Group, Panorama City, California, United States
Southern California Kaiser Permanente Medical Center, Woodland Hills, California, United States
St. Peter's University Hospital, New Brunswick, New Jersey, United States
Virtua Perinatology Associates of Voorhees, Voorhees, New Jersey, United States
South Carolina Clinical Research, Columbia, South Carolina, United States
Winthrop University Hospital, Mineola, New York, United States
Center for Fetal Medicine, Los Angeles, California, United States
San Francisco Perinatal Associates, San Francisco, California, United States