![](https://researchhso.stage.drupal.uiowa.edu/sites/hso.research.uiowa.edu/files/default_images/HSOeBook.jpg)
A protocol designed to evaluate one or more interventions aimed at identifying a disease or health condition (ClinicalTrials.gov)
A protocol designed to evaluate one or more interventions aimed at identifying a disease or health condition (ClinicalTrials.gov)