1. From the Department of Obstetrics and Gynecology, University of Wisconsin-Madison (C.Z., Q.Y., Q.-Y.Z., X.-Q.Z., C.T.T., I.M.B., J.Z.)
2. Department of Obstetrics and Gynecology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, China (Q.Y.)
3. Department of Pediatrics, the 3rd Affiliated Hospital of Guangzhou Medical University, Guangdong, China (X.-Q.Z.)
4. Department of Obstetrics and Gynecology, University of South Florida, Tampa (R.R.M.)
5. Cardiovascular Medicine Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China (J.Z.).