Patients in cohort 1 will be randomized within 24 hours after registration. Block randomization will be used to randomly assign patients in a 1:1 manner between arms A and B. Randomization will be stratified by prior immunotherapy used as cancer treatment. For randomization, authorized staff should call 240-760-7968 between the hours of 8:30 a.m. and 5:00 p.m., Monday through Friday.