1. The Center for Health Research, Northwest/Hawaii/Southeast, Kaiser Permanente Northwest; Portland OR USA
2. City of Hope Medical Center/Beckman Research Institute; Department of Nursing Research and Education; Duarte CA USA
3. Division of Research; Kaiser Permanente Northern California; Oakland CA USA
4. Southern Arizona Veterans Affairs Health Care System; Tucson AZ USA
5. University of Arizona; College of Medicine; Tucson AZ USA