Vitamin B-12 Status during Pregnancy and Child’s IQ at Age 8: A Mendelian Randomization Study in the Avon Longitudinal Study of Parents and Children

• Carolina Bonilla ,

  * E-mail: C.Bonilla@bristol.ac.uk

  Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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• Debbie A. Lawlor,

  Affiliations School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom, MRC Centre for Causal Analyses in Translational Epidemiology, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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• Amy E. Taylor,

  Affiliation MRC Centre for Causal Analyses in Translational Epidemiology, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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• David J. Gunnell,

  Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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• Yoav Ben–Shlomo,

  Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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• Andrew R. Ness,

  Affiliation School of Oral and Dental Sciences, University of Bristol, Bristol, United Kingdom

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• Nicholas J. Timpson,

  Affiliations School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom, MRC Centre for Causal Analyses in Translational Epidemiology, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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• Beate St Pourcain,

  Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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• Susan M. Ring,

  Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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• Pauline M. Emmett,

  Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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• A. David Smith,

  Affiliation Department of Pharmacology, University of Oxford, Oxford, United Kingdom

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• Helga Refsum,

  Affiliations Department of Pharmacology, University of Oxford, Oxford, United Kingdom, Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway

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• Craig E. Pennell,

  Affiliation School of Women’s and Infant’s Health, University of Western Australia, Australia

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• Marie-Jo Brion,

  Affiliations School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom, MRC Centre for Causal Analyses in Translational Epidemiology, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom, School of Women’s and Infant’s Health, University of Western Australia, Australia

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• George Davey Smith,

  Affiliations School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom, MRC Centre for Causal Analyses in Translational Epidemiology, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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•  [ ... ],
• Sarah J. Lewis

  Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

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