[1] Seoul National University College of Medicine,Department of Obstetrics and Gynecology
[2] University of Ulsan College of Medicine,Department of Obstetrics and Gynecology
[3] Asan Medical Center,Department of Obstetrics and Gynecology
[4] Seoul Metropolitan Government Seoul National University Boramae Medical Center,Department of Biostatistics
[5] Seoul Women’s Hospital,Center for Prenatal Biomarker Research
[6] Seoul Metropolitan Government Seoul National University Boramae Medical Center,Department of Obstetrics and Gynecology
[7] CHA Advanced Research Institute,undefined
[8] CHA Bundang Medical Center,undefined
[9] CHA University,undefined