Author Contribution
All authors contributed to the design of the study. EW, CR, AAP, CJJ and
JG contributed to article selection and data extraction. EW, CR and JG
conducted the analyses and wrote the initial draft of the manuscript.
All authors contributed to the interpretation of the data, revised the
manuscript and approved the final version.
Figure 1. STROBE checklist response rates by paper section and study
design using a conservative or liberal scoring.