1. USC Leonard D. Schaeffer Center for Health Policy and Economics; University of Southern California; Los Angeles CA
2. Information Sciences Institute; University of Southern California; Marina del Rey CA
3. Department of Computer Science; Viterbi School of Engineering; University of Southern California; Marina del Rey CA
4. Division of General Internal Medicine and Health Services Research; David Geffen School of Medicine at the University of California; Los Angeles CA
5. Veterans Administration Los Angeles; Los Angeles CA
6. School of Pharmacy; University of Southern California; Los Angeles CA