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Blood folic acid and vitamin B12 in relation to neural tube defects |
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| Authors: | N. J. Wald Professor A. K. Hackshaw Statistician R. Stone Laboratory Manager Nefertiti A. Sourial Lecturer |
| Affiliation: | Department of Environmental and Preventive Medicine, St Bartholomew's Hospital Medical College, London;Department of Haematology, St Bartholomew's Hospital, London, UK |
| Abstract: | |
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