-Analyses. From: “Preferred Resporting Items for Systematic Reviews and Meta-Analysis: The Prisma Statement,” D. Moher, A. Liberati, J. Tetziaff, & D. Altman, 2009, PLoS Medicine, 6 (7), Article 1000097. Data Extraction Two independent reviewers (S.L.C. Veldman and A.S. Singh or J.M. Koedijker or L. Balk) extracted the