Authors: Vittorio Maio; Laura Pizzi; Adam R Roumm; Janice Clarke; Neil I Goldfarb; David B Nash; David Chess Journal: Milbank Q Date: 2005 Impact factor: 4.911
Authors: Aaron S Kesselheim; Alexander S Misono; Joy L Lee; Margaret R Stedman; M Alan Brookhart; Niteesh K Choudhry; William H Shrank Journal: JAMA Date: 2008-12-03 Impact factor: 56.272