Symposium: Development of Deoxynucleoside Therapy for Thymidine Kinase 2 Deficiency (TK2d) 

• SYMPL1 • Clinical overview and Natural History Spectrum of TK2d > C. Caterina GARONE (Bologna, Italy) • SYMPL2 • Pharmacological and Gene Therapy in TK2 mutant mice  > C. Carlos LOPEZ-GOMEZ (Malaga, Spain) • SYMPL3 • Contributions of a Spanish Network to TK2d diagnosis and therapy > C. Cristina DOMÍNGUEZ-GONZÁLEZ (Madrid, Spain) • SYMPL4 • Expanded Access Deoxynucleos(t)ide TK2d Therapy at a US Site > M. Michio HIRANO (New York, Usa)