{"0": "Biliary tract abnormality", "1": "Mental deterioration", "2": "Abnormal biliary tract morphology", "3": "Muscle abnormality related to mitochondrial dysfunction", "4": "Corneal opacity", "5": "Abnormality of the mitochondrion", "6": "Mitochondrial myopathy", "7": "Abnormal circulating cholesterol concentration", "8": "Horizontal nystagmus", "9": "Hypertrophic cardiomyopathy", "10": "Ragged red muscle fibers", "11": "Abnormal activity of mitochondrial respiratory chain", "12": "Abnormality of hepatobiliary system physiology", "13": "Cognitive impairment", "14": "Ventricular arrhythmia", "15": "Dementia", "16": "Frequent falls", "17": "Cardiac conduction abnormality", "18": "Optic disc pallor", "19": "Abnormal circulating lipid concentration", "20": "Functional motor deficit", "21": "Bulbar signs", "22": "Ventricular hypertrophy", "23": "Sensorimotor neuropathy", "24": "Myoclonic seizure", "25": "Polyneuropathy", "26": "Hepatic failure", "27": "Dilated cardiomyopathy", "28": "Hypocholesterolemia", "29": "Impaired proprioception", "30": "Abnormal muscle fiber morphology", "31": "Increased csf lactate", "32": "Incoordination", "33": "Respiratory distress", "34": "Toe walking", "35": "Disproportionate short stature", "36": "Impaired vibratory sensation", "37": "Increased serum lactate", "38": "Retinopathy", "39": "Sensory neuropathy", "40": "Optic neuropathy", "41": "Clumsiness", "42": "Abnormal myocardium morphology", "43": "Abnormal peripheral myelination", "44": "Abnormal chorioretinal morphology", "45": "Peripheral demyelination", "46": "Abnormal choroid morphology", "47": "Elevated pulmonary artery pressure", "48": "Respiratory failure", "49": "Abnormal epiphyseal ossification"}