This wiki contains search synonym rings or search filters and published articles on searching according to the Pearl Harvesting Information Retrieval Framework. The organization of the synonym rings is developed around the PICOS framework (population, intervention, control group, outcomes, study design) where these subject organizers are applicable. Just click on any of interest below; read the notes on the page and then copy and paste any of them into a research database.

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Interventions/Predictor Variables
Control groups
Outcome measures
Study designs