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Christensen, Robin; Maxwell, Lara J; Jüni, Peter; Tovey, David; Williamson, Paula R; Boers, Maarten; Goel, Niti; Buchbinder, Rachelle; March, Lyn; Terwee, Caroline B; Singh, Jasvinder A; Tugwell, Peter (2015). Consensus on the Need for a Hierarchical List of Patient-reported Pain Outcomes for Metaanalyses of Knee Osteoarthritis Trials: An OMERACT Objective. Journal of rheumatology, 42(10), pp. 1971-1975. Journal of Rheumatology Pub. Co. 10.3899/jrheum.141384
Dwan, Kerry; Altman, Douglas G; Arnaiz, Juan A; Bloom, Jill; Chan, An-Wen; Cronin, Eugenia; Decullier, Evelyne; Easterbrook, Philippa J; Von Elm, Erik; Gamble, Carrol; Ghersi, Davina; Ioannidis, John P A; Simes, John; Williamson, Paula R (2008). Systematic review of the empirical evidence of study publication bias and outcome reporting bias. PLoS ONE, 3(8), e3081. Lawrence, Kans.: Public Library of Science 10.1371/journal.pone.0003081
