1. University of North Carolina Wilmington, Wilmington, NC.
2. VA San Diego Healthcare System, San Diego, CA.
3. Nursing Service for Research, VA San Diego Healthcare System, San Diego, CA.
4. Veterans Medical Research Foundation, San Diego, CA.
5. Center for Health Quality, Outcomes & Economic Research, Boston University School of Public Health, Edith Nourse Rogers Memorial Veterans Hospital, Bedford, MA.