作者单位:
Survey Research Center, Pennsylvania State University, University Park, PA, United States
[1]
Department of Health Policy and Administration, Pennsylvania State University, U.S. Steel Tower
[2]
Department of Health Policy and Administration, Pennsylvania State University, University Park, PA
[3]
Department of Sociology, Pennsylvania State University, University Park, PA, United States
[4]
发布时间
2013-11-20