作者单位:
Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
[1]
Center for Financing, Access, and Cost Trends, Agency for Healthcare Research and Quality
[2]
Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
[3]
Department of Biostatistics and Epidemiology, Perelman School of Medicine, University of
[4]
Department of Medicine, Massachusetts General Hospital, Boston, MA, United States
[5]
Department of Medicine, Oregon Health and Sciences University, Portland, OR, United States
[6]
发布时间
2014-06-29