Affiliation: | 1. Perinatal Medical Center, Saitama Medical Center, Jichi Medical University, Saitama, Japan;2. GeneTech Inc., Tokyo, Japan;3. Sequenom Laboratories, Grand Rapids, MI, USA Department of Obstetrics, Gynecology and Reproductive Medicine, Michigan State University, East Lansing, MI, USA;4. Sequenom Laboratories, San Diego, CA, USA;5. Department of Obstetrics and Gynecology, Saitama Medical University Hospital, Saitama, Japan |