Errata

摘要

In note 3, the citation details should be: Science. 1973;182 (4117):1102-8. In note 8, the citation details should be: J Rheumatol. 2009; 36(11):2531-8. The article has been corrected online. and 981 The biography of lead author Robert A. Berenson should read as follows. On page 973: Robert A. Berenson is a senior consulting researcher at the Center for Studying Health System Change and an Institute Fellow at the Urban Institute, in Washington, D.C. On page 981, paragraph 2: Berenson is a senior consulting researcher at the Center for Studying Health System Change and an Institute Fellow at the Urban Institute.