Our aim was to capture a wide range of perspectives and knowledge about engaging in TD team science. To accomplish this, we purposefully recruited interview participants representing each of the formal roles in TREC I: research center directors, principal investigators (PIs) of primary scientific subprojects, PIs of developmental pilot projects conducted within and across centers, directors of the training cores, staff of the biostatistics cores, the director and other staff of the coordination center, and trainees. Due to the limited number of persons in each of these roles, we reached out to all TREC I center directors, PIs of primary scientific subprojects, and the directors of each training core. We consulted with the TREC Scientific Program Director at the NCI to identify interview participants in the other roles who would have perspectives to share related to our research questions, based on having participated in TREC I for two or and having been successful in engaging in TD team science. When individuals who we approached declined to participate, we asked them to recommendation colleagues who represented the same roles within TREC I.
