We conducted 53 telephone interviews, with an average of eight discussions per case-study topic. A minimum of two RAND researchers and one research assistant participated in each call. The calls lasted from 30 to 60 minutes. The interviews, although open-ended, were structured around the discussion guide for each case study. The RAND callers took extensive notes during the interviews, but they were not recorded or formally transcribed. After each call, the researchers debriefed and discussed key points raised by the discussant and the extent to which themes were consistent with those from prior discussions. Stakeholders were promised anonymity to encourage candid discussions.