A method of treating {HEAD ~ a patient suffering} from {TAIL ~ a mitochondrial disease}, said method comprising administering to said patient a pharmaceutical composition comprising an individual fumaric acid derivative or a mixture of fumaric acid derivatives, wherein said or is selected from the group consisting of 
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A method of treating { HEAD ~ a patient suffering } from { TAIL ~ a mitochondrial disease } , said method comprising administering to said patient a pharmaceutical composition comprising an individual fumaric acid derivative or a mixture of fumaric acid derivatives , wherein said or is selected from the group consisting of
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH