Howard University Cancer Center, Howard University, Washington, DC, United States. Georgetown Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, United States. Department of Health Behavior and Policy, School of Medicine, Virginia Commonwealth University, Richmond, VA, United States. Department of Biostatistics, Bioinformatics, and Biomathematics, Georgetown University Medical Center, Washington, DC, United States. Georgetown Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, United States. Electronic address: lla9@georgetown.edu.