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Smoking during pregnancy: the dose dependence of birthweight deficits |
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| Authors: | Gordon A Ellard Senior Scientific Officer Frank D Johnstone Consultant Robin J Prescott Head of Unit Wang Ji-Xian Postgraduate Worker Mao Jian-Hua Postgraduate Worker |
| Institution: | National Institute for Medical Research, Mill Hill, London;Department of Obstetrics and Gynaecology;Medical Statistics Unit, University of Edinburgh |
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