Quality Assessment of Included Studies.
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aDropout rate less than 15% denotes low risk of bias.bOther sources of bias that are relevant only in certain circumstances such as particular trial design (eg, recruitment bias in cluster-randomized trials) and bias due to early stopping.cUnutzer 2002 and Hunkeler 2006 are the same trial, but reported different follow-up outcome data.
创建时间：
2015-12-02
