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Umbrella project approval is an administrative term to describe a research study in which a single investigator submits an IRB application that will cover multiple projects which have a common hypothesis, set of investigators, or data set and for which details of the study procedures will only change minimally, if at all. This project, termed the “umbrella”, allows for simple modification of research teams, study aims, or procedures at the discretion of the lead investigator, and approved by the IRB. For additional information and guidance about submitting an umbrella project, contact irb@uiowa.edu.