Two reviewers (B.v.G., M.C.v.d.S.) independently assessed the individual studies for risk of bias. The assessment was based on the Cochrane Collaboration tool for assessing risk of bias.29 Risk of bias and assessed types of bias are presented in Table 1. Items could be scored as low risk (+), high risk (–), unknown/not reported (?), or not applicable (NA). The assessments by the 2 independent reviewers were compared and discussed for final consensus. Another reviewer could be consulted in case of nonconsent.
Risk of Bas in Included Studies
NA, not applicable; SNQ, signal to noise quotient; +, low risk of bias; -, high risk of bias; ?, unknown/not reported.
Do you have any questions about this protocol?
Post your question to gather feedback from the community. We will also invite the authors of this article to respond.
Tips for asking effective questions
+ Description
Write a detailed description. Include all information that will help others answer your question including experimental processes, conditions, and relevant images.