 The study coordinator will serve as the operational supervisor for peer navigators, and will be responsible for facilitating communications among PNs and research staff. The study coordinator will provide technical assistance with the web-based patient tracking software and assist with review of participant-specific data. The coordinator will be responsible for matching PNs with eligible participants, ensuring that all data are collected according to the schedule and specifications in the research protocol, organizing the training and hiring of PNs, and for setting up regular operational supervision meetings. 