[1] All India Inst Med Sci, New Delhi, India
[2] UCL Queen Sq Inst Neurol, Dept Neuromuscular Dis, London, England
[3] Natl Hosp Neurol & Neurosurg, Queen Sq Ctr Neuromuscular Dis, NHS Highly Specialised Serv Rare Mitochondrial Di, London, England
[4] Ctr Cellular Mol Biol, Hyderabad, India
[5] Ctr DNA Fingerprinting & Diagnost, Hyderabad, India