| Affiliation: | 1. Prenatal Diagnosis Laboratory of New York City (a Service Division of Medical and Health Research Association of New York City, Inc.), U.S.A. Department of Pathology (PAB and MAG) and Department of Pediatrics (LYFH), New York University Medical School, U.S.A.;2. Prenatal Diagnosis Laboratory of New York City (a Service Division of Medical and Health Research Association of New York City, Inc.), U.S.A.;3. Department of Pathology (PAB and MAG) and Department of Pediatrics (LYFH), New York University Medical School, U.S.A.;4. Department of Obstetrics, Booth Memorial Hospital, Queens, New York, U.S.A. |
