Department of Neurology;
Shanghai Children's Hospital;
Shanghai Jiao Tong University;
Shanghai 200062;
China;
Department of Pharmacy;
Shanghai Children's Hospital;
Shanghai Jiao Tong University;
Shanghai 200062;
China;
Clinical Laboratory;
Shanghai Children's Hospital;
Shanghai Jiao Tong University;
Shanghai 200062;
China;
polymerase gamma; POLG; epilepsy; valproic acid; Han Chinese;