[1] Agcy Sci Technol & Res, Singapore Inst Clin Sci, Singapore, Singapore
[2] Natl Univ Singapore, Saw Swee Hock Sch Publ Hlth, Singapore, Singapore
[3] KK Womens & Childrens Hosp, Singapore, Singapore
[4] Univ Southampton, Biomed Res Ctr, Med Res Council, Lifecourse Epidemiol Unit, Southampton, Hants, England
[5] NIHR Southampton Southampton, Southampton, Hants, England
[6] Univ Hosp Southampton NHS Fdn Trust, Southampton, Hants, England
[7] Univ Auckland, Liggins Inst, Auckland, New Zealand
[8] Natl Univ Singapore, Yong Loo Lin Sch Med, Dept Obstet & Gynaecol, Singapore, Singapore
[9] Natl Univ Hlth Syst, Singapore, Singapore
[10] McGill Univ, Dept Psychiat & Neurol, Montreal, PQ, Canada
[11] McGill Univ, Dept Neurosurg, Montreal, PQ, Canada