Was an “a priori” design provided? |
Yes |
Was there duplicate study selection and data extraction? |
Yes |
Was a comprehensive literature search performed? |
Yes |
Was the status of publication (ie, gray literature) used as an inclusion criterion? |
Yes |
Was a list of studies (included and excluded) provided? |
Yes |
Were the characteristics of the included studies provided? |
Yes |
Was the scientific quality of the included studies assessed and documented? |
Yes |
Was the scientific quality of the included studies used appropriately in formulating conclusions? |
Yes |
Were the methods used to combine the findings of studies appropriate? |
N/a |
Was the likelihood of publication bias assessed? |
Yes |
Was the conflict of interest stated? |
Yes |