current statement unable to produce convincing evidence http://www.cdc.gov/ncbddd/autism/mitochondrial-faq.html http://www.cdc.gov/ncbddd/autism/mitochondrial-faq.html unable to produce convincing evidence current statement mitochondrial disease mitochondrial disease http://www.cdc.gov/ncbddd/autism/mitochondrial-faq.html unable to produce convincing evidence mitochondrial unable to produce convincing evidence long-term dysfunction Mitochondrial Disease FAQ current statement mitochondrial disease mitochondrial disease mitochondrial