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Shamliyan TA, Kane RL, Ansari MT, Raman G, Berkman ND, Grant M, Janes G, Maglione M, Moher D, Nasser M, Robinson KA, Segal JB, Tsouros S.Shamliyan TA, et al. Among authors: robinson ka.J Clin Epidemiol. 2011 Jun;64(6):637-57. doi: 10.1016/j.jclinepi.2010.08.006. Epub 2010 Nov 11.J Clin Epidemiol. 2011.PMID: 21071174
Robinson KA, Whitlock EP, Oneil ME, Anderson JK, Hartling L, Dryden DM, Butler M, Newberry SJ, McPheeters M, Berkman ND, Lin JS, Chang S.Robinson KA, et al.Syst Rev. 2014 Jun 23;3:60. doi: 10.1186/2046-4053-3-60.Syst Rev. 2014.PMID: 24956937Free PMC article.