7. History of an inherited mitochondrial disorder (e.g., Leber's hereditary neuropathy, neuropathy, ataxia, retinitis pigmentosa and ptosis [NARP], myoneurogenic gastrointestinal encephalopathy [MNGIE], myoclonic epilepsy with ragged red fibers [MERFF] and mitochondrial myopathy, encephalomyopathy, lactic acidosis and stroke-like syndrome [MELAS]