[1] Agcy Sci Technol & Res, Singapore Inst Clin Sci, Singapore, Singapore
[2] Natl Univ Singapore, Dept Pediat, Singapore, Singapore
[3] Kandang Kerbau Women & Childrens Hosp, Singapore, Singapore
[4] Natl Univ Singapore, Yong Loo Lin Sch Med, Obstet & Gynecol, Singapore, Singapore
[5] Natl Univ Hlth Syst, Singapore, Singapore
[6] Duke Natl Univ, Singapore, Singapore
[7] McGill Univ, Montreal, PQ, Canada
[8] Nanyang Technol Univ, Natl Inst Educ, Ctr Res Child Dev, Singapore, Singapore
[9] Vrije Univ Amsterdam Med Ctr, Dept Psychiat, Amsterdam, Netherlands