[1] Univ Southampton, MRC Lifecourse Epidemiol Unit, Southampton, Hants, England
[2] Univ Southampton, Inst Dev Sci, Southampton, Hants, England
[3] Agcy Sci Technol & Res, Singapore Inst Clin Sci, Singapore, Singapore
[4] Univ Auckland, Liggins Inst, Auckland 1, New Zealand
[5] Univ Southampton, NIHR Southampton Biomed Res Ctr, Southampton, Hants, England
[6] Univ Hosp Southampton NHS Fdn Trust, Southampton, Hants, England