1Columbia University, New York
2Drexel University, Philadelphia
3Wayne State University, Detroit
4George Washington University Biostatistics Center, Washington, DC
5Ohio State University, Columbus
6University of Utah, Salt Lake City
7National Institute of Child Health and Human Development, Bethesda, MD
8Northwestern University, Chicago
9University of Texas, Southwestern Medical Center, Dallas
10University of Pittsburgh Magee–Womens Hospital, Pittsburgh
11Case Western Reserve University, Cleveland
12Wake Forest University School of Medicine, Winston-Salem, NC
13University of Alabama, Birmingham.
14University of North Carolina, Chapel Hill
15University of Texas, Houston
16Brown University, Providence, RI
17Vanderbilt University, Nashville