[1] Barcelona Inst Global Hlth ISGlobal, Barcelona, Spain
[2] Univ Pompeu Fabra UPF, Barcelona, Spain
[3] Epigeny, St Ouen, France
[4] Univ Liverpool, Dept Publ Hlth Policy & Syst, Liverpool, England
[5] Ctr Invest Biomed Red Epidemiol & Salud Publ CIBER, Barcelona, Spain
[6] Univ Paris Cite, Ctr Res Epidemiol & Stat CRESS, Obstetr Perinatal & Pediat Epidemiol Res Team EPOP, INSERM,INRAE, F-75006 Paris, France
[7] Univ Coll London Hosp, Elizabeth Garrett Anderson Inst Womens Hlth, London, England
[8] Newcastle Univ, Populat Hlth Sci Inst, Newcastle, England