[1] JOHNS HOPKINS UNIV,DEPT NEUROL,BALTIMORE,MD 21218
[2] JOHNS HOPKINS UNIV,DEPT PEDIAT,BALTIMORE,MD 21218
[3] LONG ISL COLL HOSP,DEPT OBSTET & GYNECOL,BROOKLYN,NY 11201
[4] SUNY DOWNSTATE MED CTR,BROOKLYN,NY 11203
[5] CHILDRENS HOSP,PHILADELPHIA,PA 19104
[6] MAILMAN CTR CHILD DEV,MIAMI,FL