preferred_name: Decreased activity of mitochondrial complexes I and IV seen on skeletal muscle biopsy
preferred_name_lc: decreased activity of mitochondrial complexes i and iv seen on skeletal muscle biopsy
label: Decreased activity of mitochondrial complexes I and IV seen on skeletal muscle biopsy
label_lc: decreased activity of mitochondrial complexes i and iv seen on skeletal muscle biopsy