1. From the Nuffield Department of Women’s & Reproductive Health, University of Oxford, Women’s Centre, John Radcliffe Hospital, Oxford, United Kingdom (M.G., C.M.-M., N.K., W.C., W.Z., A.S.C., C.R., M.V.)
2. Department of Biomedical Sciences, Warwick Medical School, University of Warwick, Coventry, United Kingdom (C.B.).