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Assessing risk of bias and confounding in observational studies of interventions or exposures
Further development of the RTI item bank. Methods research report
Viswanathan, M., Berkman, N., Dryden, D., & Hartling, L. (2013). Assessing risk of bias and confounding in observational studies of interventions or exposures: Further development of the RTI item bank. Methods research report. Agency for Healthcare Research and Quality. Agency for Healthcare Research and Quality No. AHRQ Publication No. 13-EHC106-EF
