Expression levels of bile acid synthesis- and secretion-associated genes and phospholipid synthesis- and secretion-associated genes. CYP7A1 cholesterol 7α-hydroxylase, FXR farnesoid X receptor, BSEP bile salt export pump, MDR3 multidrug resistance 3, PPARα peroxisome proliferator-activated receptor α, SREBP-1c sterol regulatory element-binding protein-1c. * Significant difference between PBC patients and normal control