1. Department of Reproductive Medicine and Gynaecology (J.v.D., F.J.M.B.), University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands
2. Department of School of Mathematical Sciences (M.J.F.), Queensland University of Technology, Brisbane, Queensland 4000, Australia
3. Department of Internal Medicine (A.P.N.T., F.H.d.J.), Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands
4. Department of Julius Center for Health Sciences and Primary Care (P.H.M.P., Y.T.v.d.S.), University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands