IntraBio's Levacetylleucine Succeeds in Phase 3 Trial for Ataxia-Telangiectasia, Plans FDA and EMA Approval on January 21, 2026 Approved Ataxia Telangiectasia Infrequent IntraBio levacetylleucine Multiple Acyl Coenzyme A Dehydrogenase Deficiency Phase 3 United States Food and Drug Administration +