Drilon Drilon A A Efficacy of larotrectinib in TRK fusion-positive cancers in adults and children Efficacy of larotrectinib in TRK fusion-positive cancers in adults and children N Engl J Med N Engl J Med 2018 2018 378 378 731 731 739 739 supplied-pmid 5857389? This evidence concerns the gene NTRK1 and cancer.