These can be the result of flaws in the randomized controlled trials and/or unrecognized author bias." Level one evidence and the randomized controlled trials (RCTs) that comprise it are widely ...

In an RCT, the product is randomly assigned to a group ... Fourth, RCTs eliminate inherent bias. Many districts and schools pilot programs and products with volunteers before deciding whether ...

A total of seven RCTs that evaluated tramadol against a comparator (placebo, another agent, or behavioural therapy) and one RCT that evaluated different tramadol doses (eight RCTs in total ...

Objective Stem cell injection for knee osteoarthritis (KOA) is an emerging new therapy, and we aimed to review its evidence of efficacy. Design Systematic review. Eligibility criteria Criteria for ...