A randomized comparison of transcervical and transabdominal chorionic-villus sampling. The U.S. National Institute of Child Health and Human Development Chorionic-Villus Sampling and Amniocentesis Study Group.
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D. Ledbetter | R. Desnick | L. Jackson | J. Simpson | R. Wapner | E. Pergament | M. Golbus | M. Mahoney | S. Fowler | J. Zachary | S. Black | J. Simpson | Laird G. Jackson | Sue Black