[1] Univ Edinburgh, Usher Inst, Edinburgh, Midlothian, Scotland
[2] Univ Edinburgh, MRC, Ctr Reprod Hlth, Edinburgh, Midlothian, Scotland
[3] Univ Birmingham, Birmingham, W Midlands, England
[4] Dalhousie Univ, Halifax, NS, Canada
[5] Queen Elizabeth Univ Hosp Glasgow, Glasgow, Lanark, Scotland
[6] Guys & St Thomas Hosp, London, England
[7] UCL, London, England
[8] Univ London, St Georges Hosp, London, England
[9] KingsColl London, London, England
[10] Univ Amsterdam, Acad Med Ctr, Amsterdam, Netherlands
[11] Univ Med Ctr, Julius Ctr Hlth Sci & Primary Care, Utrecht, Netherlands
[12] PPI Representat, Edinburgh, Midlothian, Scotland
[13] Monash Univ, Melbourne, Vic, Australia
[14] Univ Keele, Keele, Staffs, England
[15] Univ Bristol, Bristol, Avon, England