This report provides a comprehensive assessment of the recruitment effort to identify, solicit, and enroll volunteers for POD. It presents insights about who enrolled in POD and how they differed from non-volunteers, information about how enrollees were assigned to research groups that will be used to measure the impacts of POD, and an early assessment of withdrawals from POD. These findings can be used as the basis for understanding and interpreting POD evaluation results that will be presented in future reports.