Source | Type of study | 1. ‘a priori’ design | 2. Duplicate selection and data extraction | 3. Comprehensive search | 4. Status of publication | 5. List of studies | 6. Characteristics provided | 7. Scientific quality assessed | 8. Scientific quality in conclusions | 9. Methods to combine findings | 10. Publication bias | 11. Conflict of interest |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Johansen et al. 2012 [58] | Meta-analysis | N | U | U | N | Y | Y | N | N | Y | N | Y |