Selecting studies

Once a search is completed, relevant studies must then be selected without bias. Reviewers usually work independently and document the outcome of all disputed decisions. Some feel that those selecting the trials should be blind to the study's author, source (usually a journal), and the institution where the trial was undertaken. All have potential to bias the study selection. However, such blinding would often involve prohibitive effort. In any event, a systematic review should make explicit the degree of effort made to avoid selection bias at this crucial stage.

5 Secrets to Lasting Longer In The Bedroom

5 Secrets to Lasting Longer In The Bedroom

How to increase your staying power to extend your pleasure-and hers. There are many techniques, exercises and even devices, aids, and drugs to help you last longer in the bedroom. However, in most cases, the main reason most guys don't last long is due to what's going on in their minds, not their bodies.

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