1. University of North Carolina (M.L.D.), Chapel Hill, North Carolina 27599
2. University of Lilly Research Laboratories (B.J.C., C.L., A.J.Z., C.A.Q.), Indianapolis, Indiana 46285
3. The Children’s Hospital (S.H.T.), affiliated with the University of Colorado Health Sciences Center, Denver, Colorado 80218
4. Connecticut Children’s Medical Center (K.R.), Hartford, Connecticut 06106
5. Thomas Jefferson University (J.L.R.), Philadelphia, Pennsylvania 19107
6. Children’s Hospital Medical Center (P.Y.F., D.F.G.), Seattle, Washington 98105
7. The Saban Research Institute of the Children’s Hospital Los Angeles (M.E.G.), Los Angeles, California 90027
8. University of Arkansas for Medical Sciences (K.T.), Little Rock, Arkansas 72205
9. Children’s Mercy Hospital (C.H.), Kansas City, Missouri 64108