1. Department of Physiological Nursing, School of Nursing, University of California, San Francisco, CA, USA
2. Department of Psychiatry, School of Medicine, University of Arkansas, Little Rock, AK, USA
3. Phyllis F. Cantor Research Center, Dana Farber Cancer Institute, Boston, MA, USA
4. Department of Health Promotion and Prevention, School of Nursing, University of Pittsburgh, Pittsburgh, PA, USA
5. Department of Medicine, School of Medicine, University of California, San Francisco, CA, USA