RecruitingPhase 3Drug trialAn Open-label Study to Evaluate the Pharmacokinetics and Safety of Bimekizumab in Pediatric Study Participants With Active Juvenile Idiopathic Arthritis Subtypes Enthesitis-related Arthritis (Including Juvenile-onset Ankylosing Spondylitis) and Juvenile Psoriatic ArthritisThe purpose of this study is to assess plasma bimekizumab concentrations following subcutaneous (sc) bimekizumab administration.