1. Health Education and Behavior Department, University of Florida , Gainesville, Florida 32608 , USA
2. Department of Psychology, Tulane University , New Orleans, Los Angeles 70118 , USA
3. Departments of Psychiatry and Medicine, Tulane Cancer Center, and A.B. Freeman School of Business, Tulane University , New Orleans, Los Angeles 70118 , USA
4. Department of Palliative and Supportive Medicine, University Medical Center of New Orleans , Los Angles 70118 , USA