ABCG2 and basal cell carcinoma: The following 8 pathways of the top 20 pathways were activated when comparing to the HH vs. CON groups and the HH + CIA vs. CIA groups: ABC transporter pathways, purine metabolism, carbohydrate digestion and absorption, glutathione metabolism, steroid biosynthesis, basal cell carcinoma pathways, central carbon metabolism pathways in cancer, and primary bile acid biosynthesis.