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Auteur Alexander-M WALKER |
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Tobias KURTH ; Klaus Berger ; Karnold CHAN ; GAZIANO (Jmichael) : USA. Massachusetts Veterans Epidemiology Research and Information Center. Boston Va Healthcare System. Boston. MA. ; GLYNN (Robert-J) : USA. Division of Pharmacoepidemiology and Pharmacoeconomics. Department of Medicine. Brigham and Women's Hospital. Harvard Medical School. Boston. MA. ; James-M ROBINS ; Alexander-M WALKER ; Brigham and Women's Hospital. Harvard Medical School. Department of Medicine. Division of Aging. Boston. MA. USA ; Brigham and Women's Hospital. Harvard Medical School. Department of Medicine. Division of Preventive Medicine. Boston. MA. USA ; i3 Drug Safety. Auburndale. MA. USA |[BDSP. Notice produite par INIST-CNRS 301BR0xx. Diffusion soumise à autorisation]. Observational studies often provide the only available information about treatment effects. Control of confounding, however, remains challenging. The authors comp[...]Article
Sonia HERNANDEZ-DIAZ ; Allen-A MITCHELL ; Alexander-M WALKER ; Martha-M WERLER ; Department of Epidemiology. Harvard School of Public Health. Boston MA. USA ; Slone Epidemiology Unit. Boston University School of Public Health. Brookline. MA. USA |[BDSP. Notice produite par INIST GWJQ5R0x. Diffusion soumise à autorisation]. Periconceptional folic acid supplementation reduces the risk of neural tube defects (NTDs). To determine whether periconceptional exposure to folic acid antagonists (F[...]