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S. Ruiz-Martinez
E. Staines-Urias
R. Gonzalez-Aguero
A.T. Papageorghiou
D. Oros
Obstetrics, Aragon, Institute for Health Research (IIS Aragón), Zaragoza, Spain
Nuffield Department of Obstetrics and Gynaecology, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
Spain
United Kingdom
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Cohort
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