The 12 quality criteria (Table 1) were adapted from Furlan et al. (2009). Each item was scored as “yes”, “no”, or “don’t know”. High quality was defined as a “yes”-score of ≥50%. A consensus

procedure was used to solve any disagreement between the reviewers. In a (Cochrane) review the use of a methodological quality assessment is standard procedure. We describe the methodological quality scale or criteria used in the review, and used their ratings as high/low quality for the included studies. A quantitative analysis of the studies was not possible due to heterogeneity of the outcome measures. Therefore, we summarized the results using a best-evidence synthesis (van Tulder et al., 2003). The article was included in the best-evidence synthesis only if a comparison was made between the groups (treatment versus placebo, control, or treatment) and the level of significance was reported. The results Paclitaxel cell line of the study were labeled significant if one of the three outcome measures (pain, function,

improvement) reported significant results. The levels of evidence for effectiveness are ranked as follow: 1. Strong evidence: consistent* positive (significant) findings within multiple high-quality RCTs. *When ≥75% of the trials report the same findings. The initial literature search resulted in 6 potentially relevant (Cochrane) reviews and 364 RCTs. Finally, 3 Cochrane reviews and 14 RCTs met our inclusion criteria. AZD2281 in vitro Fig. 1 shows the process of identifying the relevant articles. The three reviews studied effectiveness of corticosteroid injections for shoulder pain (Buchbinder et al., 2003), surgery for rotator cuff disease (Coghlan et al., 2008), and interventions (conservative, surgical and post-surgical) for RotCuffTears (Ejnisman et al., 2004). We excluded the results on surgery and corticosteroid injections found in the review of Ejnisman Liothyronine Sodium et al. (2004), because these treatments are also studied in the more recent reviews of Coghlan et al. (2008) and Buchbinder et al. (2003) respectively. The characteristics

of the included studies are listed in Appendix 1A and 1B. The methodological scores of the included studies are reported in Table 2. To assess the quality of the included 14 recent and additional RCTs we used the list of Furlan et al. (2009). Seven of the 14 included recent and additional RCTs were of high quality; 13 of the 14 RCTs performed adequate randomization and were free of suggestions of selective outcome reporting. In none of the RCTs the care provider was blinded. We adopted the quality assessment of the included Cochrane reviews. All assessed the quality of the included RCTs in different ways (Table 2). In the Cochrane review of Buchbinder et al. (2003) 5 quality items were scored. The RCT of Shibata et al. scored 2 of these items as positive and 3 items as unclear; therefore, this latter RCT was scored as low quality. Ejnisman et al.