[1] COLUMBIA UNIV,COLL PHYS & SURG,DEPT PEDIAT,NEW YORK,NY 10032
[2] COLUMBIA UNIV,COLL PHYS & SURG,DIV PERINATAL MED,NEW YORK,NY 10032
[3] COLUMBIA UNIV,COLL PHYS & SURG,DEPT PATHOL,NEW YORK,NY 10032
[4] CHILDRENS MED & SURG CTR NEW YORK,BABIES HOSP,NEW YORK,NY