Affiliation: | (1) Department of Obstetrics and Gynaecology, Wythenshawe Hospital, South Manchester University Hospitals NHS Trust, Southmoor Road, Wythenshawe, Manchester, M23 9LT, UK;(2) Department of Obstetrics and Gynaecology, St Mary s Hospital, Manchester, Lancashire, UK;(3) Department of Obstetrics and Gynaecology, Burnley General Hospital, Burnley, UK |