1. Department of Psychiatry, Abramson Cancer Center University of Pennsylvania Philadelphia Pennsylvania
2. Center for Clinical Epidemiology and Biostatistics University of Pennsylvania Philadelphia Pennsylvania
3. Department of Psychiatry, Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania
4. Department of Preventive Medicine, Feinberg School of Medicine Northwestern University Evanston Illinois
5. Pulmonary, Allergy, & Critical Care Division University of Pennsylvania Philadelphia Pennsylvania
6. Keck School of Medicine, USC Norris Comprehensive Cancer Center University of Southern California Los Angeles California
7. Department of Psychiatry, Department of Pharmacology and Toxicology, Division of Brain and Therapeutics, Centre for Addiction and Mental Health, Campbell Family Mental Health Research Institute University of Toronto Toronto Ontario Canada
8. Addictions Division, Centre for Addiction and Mental Health, Department of Psychiatry University of Toronto Toronto Ontario Canada
9. Department of Psychology State University of New York Buffalo Buffalo New York
10. Department of Behavioral Science The University of Texas MD Anderson Cancer Center Houston Texas