[1] UNIV FLORIDA,COLL MED,GAINESVILLE,FL
[2] PHOENIX PERINATAL ASSOCIATES,DEPT MATERNAL FETAL MED,PHOENIX,AZ
[3] TUFTS UNIV,NEW ENGLAND MED CTR,DEPT OBSTET & GYNECOL,BOSTON,MA 02111
[4] MARTIN LUTHER KING JR CHARLES R DREW UNIV,LOS ANGELES,CA
[5] UNIV TEXAS,HLTH SCI CTR,DIV NEONATOL,SAN ANTONIO,TX
[6] UNIV MINNESOTA,DEPT FAMILY PRACTICE & COMMUNITY HLTH,ST PAUL,MN 55108
[7] BAYLOR COLL MED,DEPT PEDIAT & PATHOL,DIV PEDIAT NEUROL,HOUSTON,TX 77030
[8] UNIV ALABAMA,SCH MED,CTR OBSTET RES,BIRMINGHAM,AL
[9] UNIV ALABAMA,SCH MED,DEPT OBSTET & GYNECOL,BIRMINGHAM,AL
[10] BAYLOR COLL MED,DEPT PEDIAT,HOUSTON,TX 77030
[11] WAYNE STATE UNIV,CHILDRENS HOSP MICHIGAN,DEPT PEDIAT & PHARMACOL,DETROIT,MI
[12] RAND CORP,DEPT SOCIAL POLICY,SANTA MONICA,CA 90406
[13] BROWN UNIV,WOMEN & INFANTS HOSP,SCH MED,DEPT PEDIAT,PROVIDENCE,RI
[14] PENN STATE UNIV,BIOBEHAV HLTH PROGRAM,UNIVERSITY PK,PA 16802
[15] SCH DIST HATBORO HORSHAM,ELKINS PK,PA
[16] NICHHD,BETHESDA,MD 20892
[17] UNIV PENN,SCH MED,DEPT PEDIAT,DIV NEONATOL,PHILADELPHIA,PA 19104
[18] CHILDRENS HOSP PHILADELPHIA,PHILADELPHIA,PA 19104
[19] NHLBI,DIV LUNG DIS,CELL & DEV BIOL BRANCH,BETHESDA,MD 20892
[20] YALE UNIV,DEPT EPIDEMIOL & PUBL HLTH,NEW HAVEN,CT 06520
[21] NINR,DIV EXTRAMURAL PROGRAMS,BETHESDA,MD
[22] BROWN UNIV,MEM HOSP RHODE ISL,DEPT FAMILY MED,PAWTUCKET,RI 02860
[23] NIH,OFF MED APPLICAT RES,BETHESDA,MD 20892
[24] MASSACHUSETTS GEN HOSP,VINCENT MEM HOSP,DIV OBSTET,BOSTON,MA 02114
[25] UNIV TEXAS,SW MED CTR,DEPT OBSTET & GYNECOL,DALLAS,TX 75235
[26] UNIV CALIF LOS ANGELES,HARBOR MED CTR,SCH MED,WALTER P MARTIN RES CTR,TORRANCE,CA 90509
[27] UNIV COLORADO,SCH MED,DEPT PEDIAT,DENVER,CO
[28] CHILDRENS HOSP,DENVER,CO 80218
[29] UNIV PENN,SCH NURSING,PHILADELPHIA,PA 19104
[30] UNIV COLORADO,CHILDRENS HOSP,SCH MED,DEPT PEDIAT,DENVER,CO 80202
[31] NICHHD,OFF SCI POLICY & ANAL,BETHESDA,MD 20892
[32] NICHHD,CTR RES MOTHERS & CHILDREN,BETHESDA,MD 20892