Although a great deal has been written about the need for more research in the HPT field, specific research questions have not recently been identified. This study used a three-round Delphi approach to identify research questions of interest to experts in the field, resulting in 100 questions that were classified under ten categories. Participants prioritized the research categories and rated each question as to its importance to the field. Summary statistics for all categories and questions are presented. (Contains 12 tables.)