{"denoms":[{"counts":[{"groupId":"OG000","value":"0"}],"units":"Participants"}],"description":"Percent of target cell lysis by NK cells","groups":[{"description":"10 mg oral daily, on days 1-21 of repeated 28 day cycles, to continue until disease progression or unacceptable toxicity.\n\nLenalidomide: 10 mg oral daily, on days 1-21 of repeated 28 day cycles, to continue until disease progression or unacceptable toxicity.","id":"OG000","title":"Lenalidomide Maintenance Therapy for Multiple Myeloma"}],"populationDescription":"This outcome was not done because this study was closed prior to full enrollment. Given study closure, the primary endpoint could not be and was not evaluated. There was not an adequate amount of specimens collected to arrive to any analyses conclusions.","reportingStatus":"POSTED","timeFrame":"participants were followed for the duration of their treatment, an average of 2 years","title":"Natural Killer (NK) Cell Function and Activity","type":"SECONDARY"}