| http://www.w3.org/ns/prov#value | - RCTs, CCTs and meta-analysis were evaluated for study quality and study design bias using the Scottish Intercollegiate Guidelines Network (SIGN) checklists [12, 13] (see Table 1).Table 1: SIGN checklist [1].Also, there were independent assessments of the quality of the studies selected, and data extraction comprised descriptive information of the study population, the types of interventions, and t
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