Spinal anesthesia in MELAS syndrome: a case with mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes. - Hsiao,P.N.; Cheng,Y.J.; Tseng,H.C.; Chuang,Y.H.; Kao,P.F.; Tsai,S.K. (Acta Anaesthesiol Sin, 2000)