1. University of WashingtonSeattle, Washington
2. Veterans Affairs Puget Sound Healthcare SystemSeattle, Washington
3. Indiana University School of MedicineIndianapolis, Indiana
4. Tulane University School of MedicineNew Orleans, Louisiana
5. University of California–San FranciscoSan Francisco, California
6. National Institutes of HealthBethesda, Maryland
7. David Geffen School of Medicine at the University of California–Los AngelesLos Angeles, Californiaand