RecruitingClinical trialRestarting Triple Therapy With Robust Monitoring for Adverse Events (RETRIAL)RETRIAL is a multi-site observational study of people with Cystic Fibrosis (PWCF) ages 6 and up starting the new triple-therapy modulator (vanzacaftor/tezacaftor/deutivacaftor (VTD)), after having experienced neuropsychiatric events and/or liver injury while taking elexacaftor/tezacaftor/ivacaftor (ETI) that resulted in a modification or discontinuation of standard ETI dosing.