1 Department of Family and Community Medicine, Baylor College of Medicine, Houston, TX, United States.
2 Department of Medicine, Section of Epidemiology and Population Sciences, Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX, United States.
3 Houston Cancer Treatment Centers, Houston, TX, United States.
4 College of Public Health, Morsani College of Medicine, University of South Florida, Tampa, FL, United States.