作者单位:
Cecil G. Sheps Center for Health Services Research, Chapel Hill, United States
[1]
Department of Epidemiology, The University of North Carolina at Chapel Hill, Chapel Hill, United
[2]
Department of Nutrition, The University of North Carolina at Chapel Hill, Chapel Hill, United
[3]
Department of Obstetrics and Gynecology, The University of North Carolina at Chapel Hill, Chapel
[4]
发布时间
2013-11-20