Growth Observational Study

George Washington University, Washington D.C.

Emory University, Atlanta

University of Miami, Miami

University of Tennessee, Memphis

Case Western Reserve University, Rainbow Babies and Children's Hospital, Cleveland

Cincinnati Children's Medical Center, Cincinnati

Indiana University, Indianapolis

Wayne State University, Detroit

University of Texas Southwestern Medical Center at Dallas, Dallas

University of New Mexico, Albuquerque

Stanford University, Palo Alto

Yale University, New Haven

Brown University, Women & Infants Hospital of Rhode Island, Providence