Primary Outcomes

Description: Percentage of participants with response to combination Nivolumab and epigenetic therapy. Response will be assessed by RECIST 1.1 criteria, where complete response (CR)= disappearance of all target lesions, partial response (PR) is =>30% decrease in sum of diameters of target lesions, progressive disease (PD) is >20% increase in sum of diameters of target lesions, stable disease (SD) is <30% decrease or <20% increase in sum of diameters of target lesions.

Secondary Outcomes

Description: Number of months from the time of randomization until radiologic (per RECIST 1.1) or clinical progression or death, whichever comes first.

Description: Number of months from the time nivolumab begins until radiologic (per RECIST 1.1) or clinical progression is noted.

Description: Number of months from the time of randomization until death. Estimation will be by the Kaplan-Meier method.

Description: Number of participants who experience adverse events as defined by CTCAE v4.0.

Primary Outcomes

Description: Will be estimated using Kaplan-Meier method. The stratified log-rank test will be performed to test the difference in time-to-event distributions between treatment groups. Stratified Cox proportional hazards model will be utilized to include multiple covariates in the time-to-event analysis and to estimate hazard ratios.

Secondary Outcomes

Description: Will be estimated using Kaplan-Meier method. The stratified log-rank test will be performed to test the difference in time-to-event distributions between treatment groups. Stratified Cox proportional hazards model will be utilized to include multiple covariates in the time-to-event analysis and to estimate hazard ratios.

Description: Will be estimated using Kaplan-Meier method. The stratified log-rank test will be performed to test the difference in time-to-event distributions between treatment groups. Stratified Cox proportional hazards model will be utilized to include multiple covariates in the time-to-event analysis and to estimate hazard ratios.

Description: Will be estimated using Kaplan-Meier method. The stratified log-rank test will be performed to test the difference in time-to-event distributions between treatment groups. Stratified Cox proportional hazards model will be utilized to include multiple covariates in the time-to-event analysis and to estimate hazard ratios.

Description: Will be estimated using Kaplan-Meier method. The stratified log-rank test will be performed to test the difference in time-to-event distributions between treatment groups. Stratified Cox proportional hazards model will be utilized to include multiple covariates in the time-to-event analysis and to estimate hazard ratios.

Description: Toxicity data related to the treatments will be summarized by frequency tables. The association between the types and severity of toxicity and the treatment groups will be evaluated.