{"denomUnitsSelected":"Participants","description":"Comparison of change from baseline in bone marrow aspirate/biopsy PD-L1 expression between responders with longer duration of response and non-responders or responders with a short duration of response will be performed using mixed regression analysis. Longitudinal analysis of bone marrow aspirate/biopsy PD-L1 expression over time will be examined using mixed model repeated measure design with levels observed serially over time and response type (long responders vs short responders/non-response) as a fixed variable.","reportingStatus":"NOT_POSTED","timeFrame":"Bone marrow aspirate specimens will be obtained at screening and at week 15 (completion of cycle 4).","title":"Comparison in Bone Marrow Aspirates of the Extent of Pre-pembrolizumab (MK-3475), Lenalidomide and Dexamethasone PD-L1 Expression and Change From Baseline PD-L1 Expression in Responders Versus Non-responders","type":"OTHER_PRE_SPECIFIED"}