RecruitingPhase 3Drug trialStudy to Evaluate the Effectiveness and Safety of Ozanimod Compared to Fingolimod in Children and Adolescents With Relapsing Remitting Multiple SclerosisThe purpose of this study is to evaluate the effectiveness, safety, tolerability, drug levels and drug effects of ozanimod compared to fingolimod in children and adolescents with relapsing remitting multiple sclerosis (RRMS).