作者单位：School of Reproductive Medicine and Paediatrics, Faculty of Health Sciences, University of Adelaide[1]Pregnancy Outcome Unit, South Australian Department of Health, Adelaide SA, Australia[2]Department of Obstetrics and Gynaecology, Australian National University Medical School, Canberra[3]Department of Orthopaedic Surgery, Women's and Children's Hospital, Adelaide SA, Australia[4]Centre for Perinatal Care, Flinders Medical Centre, Adelaide SA, Australia[5]
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