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 Medicine, Oregon Health and Sciences University, Portland, OR, United States
[4]
发布时间
2013-11-20
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