1. Department of Psychology, Sam Houston State University, Huntsville, Texas, USA;
2. Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, Texas, USA;
3. Division of Cancer Control and Population Sciences, National Cancer Institute, Rockville, Maryland, USA;
4. Department of Palliative Care, Rehabilitation and Integrative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA;
5. Department of Medicine, Baylor College of Medicine, Houston, Texas, USA