Generate PDF of this section Section info Contact support@cochrane.org Change date 27 June 2016 Description of studies (R56-R72) Risk of bias in included studies (R73-R75) Effects of interventions (R76-R99) Discussion (R100-R101) Authors' conclusions (R102-R103) Acknowledgements (R104) Contribution of authors (R105) Declarations of interest (R106) Differences between protocol and review (R107-R108) Sources of support (R109) Book traversal links for Results (R56-R109) ‹ Data collection and analysis (R39-R55) Up Description of studies (R56-R72) ›