Keywords: آنسفالومیوپاتی میتوکندری، اسیدوز لاکتیک و موارد مشابه سکته مغزی; MDs; mitochondrial diseases; PEO; progressive external ophthalmoplegia; MELAS; mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes; MERRF; myoclonic epilepsy with ragged-red fibres; MIDD; maternally inherited diabetes and deafness;