External validation of a measurement tool to assess systematic reviews (AMSTAR).
Shea BJ, Bouter LM, Peterson J, Boers M, Andersson N, Ortiz Z, Ramsay T, Bai A, Shukla VK, Grimshaw JM., PLoS ONE. 2007 Dec 26;2(12):e1350.
Shea BJ, Bouter LM, Peterson J, Boers M, Andersson N, Ortiz Z, Ramsay T, Bai A, Shukla VK, Grimshaw JM., PLoS ONE. 2007 Dec 26;2(12):e1350.