{"classes":[{"categories":[{"measurements":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"1"}]}]}],"denoms":[{"counts":[{"groupId":"OG000","value":"3"},{"groupId":"OG001","value":"3"}],"units":"Participants"}],"description":"ECG was recorded using an ECG machine that automatically calculated the heart rate and measured PR, RR, QRS and QT duration corrected for heart rate by Fridericia's formula (QTcF) intervals. Data for number of participants with abnormal clinically significant ECG findings for worst case post-Baseline has been presented. Clinically significant abnormal laboratory findings are those which are not associated with the underlying disease, unless judged by the investigator to be more severe than expected for the participant's condition.","groups":[{"description":"Eligible participants underwent leukapheresis to manufacture engineered T-cells. Participants then underwent lymphodepleting chemotherapy with cyclophosphamide and fludarabine followed by a single intravenous (IV) infusion of GSK3377794.","id":"OG000","title":"GSK3377794"},{"description":"Eligible participants underwent leukapheresis to manufacture engineered T-cells. Participants then underwent lymphodepleting chemotherapy with cyclophosphamide and fludarabine followed by a single IV infusion of GSK3377794 in combination with pembrolizumab 200 milligrams (mg) administered as an IV infusion every 3 weeks up to Week 108.","id":"OG001","title":"GSK3377794+Pembrolizumab"}],"paramType":"COUNT_OF_PARTICIPANTS","populationDescription":"Modified ITT Population","reportingStatus":"POSTED","timeFrame":"Up to 108 weeks","title":"Number of Participants With Worst-case Post Baseline Abnormal Electrocardiogram (ECG) Findings","type":"PRIMARY","unitOfMeasure":"Participants"}