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Newly occurring was defined as participants not meeting criterion at baseline and meeting criterion post-baseline. Criteria for newly occurring notable ECG values (QT, QTcF, QTcB) were New \\> 450, New \\>480, New \\>500, Increase from baseline \\>30, Increase from baseline \\>60; heart rate: New \\<60, New \\>100.","groups":[{"description":"Participants received 300 mg of LGX818 orally once daily along with 45 mg of MEK162 twice daily for each 28 day treatment cycle until PD as confirmed by BIRC, withdrawal of consent, intolerable toxicity, study discontinuation, lost to follow-up or death.","id":"OG000","title":"Part 2: LGX818 300 mg QD+MEK162 45 mg BID (Combo 300)"},{"description":"Participants received 300 mg of LGX818 orally once daily for each 28 day treatment cycle until PD as confirmed by BIRC, withdrawal of consent, intolerable toxicity, study discontinuation, lost to follow-up or death.","id":"OG001","title":"Part 2: LGX818 300 mg"},{"description":"Participants of Part 1 and 2 received 300 mg of LGX818 orally once daily for each 28 day treatment cycle until PD as confirmed by BIRC, withdrawal of consent, intolerable toxicity, and study discontinuation, lost to follow-up or death.","id":"OG002","title":"Part 1 + Part 2: LGX818 300 mg"}],"paramType":"COUNT_OF_PARTICIPANTS","populationDescription":"Safety analysis set included all participants who received at least one dose of study medication and have at least one valid post-baseline safety evaluation. Here, \"Overall Number of Participants Analyzed\" signifies number of participants evaluable for this outcome measure and \"Number analyzed\" signifies participants evaluable at specified rows.","reportingStatus":"POSTED","timeFrame":"Baseline up to 30 days after last dose of study drug (up to 106.3 M of treatment exposure for Part 2: LGX818+MEK162 45 mg; up to 98.4 M of treatment exposure for Part 2: LGX818 300 mg; up to 111.4 M of treatment exposure for Part 1+Part 2: LGX818 300 mg)","title":"Part 2: Number of Participants With Newly Occurring Notable ECG Values","type":"SECONDARY","unitOfMeasure":"Participants"}