To develop a list of high-priority research questions, the committee made more than 20,000 solicitations to stakeholders and received input from direct mail, a public session of 54 stakeholders, and a Web-based questionnaire that garnered nearly 1,800 submissions suggesting more than 2,600 topics. The committee developed criteria to assess their importance and a process for prioritization. Through three rounds of voting, the list was narrowed to 100 highest-priority topics, which are organized into quartiles of importance.