[1] Kings Coll London, Sch Biomed Engn & Imaging Sci, London, England
[2] Kings Coll London, Dept Twin Res & Genet Epidemiol, London, England
[3] Kings Coll London, Sch Life Course Sci, Fac Life Sci & Med, Dept Women & Childrens Hlth, London, England
[4] Newcastle Univ, Populat Hlth Sci Inst, Fac Med Sci, Newcastle Upon Tyne, Tyne & Wear, England
[5] London Sch Hyg & Trop Med, Fac Epidemiol & Populat Hlth, Dept Populat Hlth, London, England
[6] St Thomas Hosp, Acad Hlth Sci Ctr, Kings Hlth Partners, Childrens Neurosci,Evelina London Childrens Hosp, London, England
[7] Guys & St Thomas NHS Fdn Trust, Dept Endocrinol, London, England