Prematurity and Respiratory Outcomes Program (PROP)

University of Buffalo, Buffalo

University of Rochester, Rochester

Duke University Medical Center, Durham

Monroe Carell Jr Children's Hospital at Vanderbilt, Nashville

Jackson-Madison County General Hospital, Jackson

Cincinnati University Hospital, Cincinnati

Good Samaritan Hospital, Cincinnati

Cincinnati Children's Hospital, Cincinnati

Indiana University Health/Riley Hospital for Children, Indianapolis

Washington Universitiy, St Louis

University of Texas, Houston, Houston

University of California, San Francisco, San Francisco

Alta Bates Summit Medical Center, Oakland