For example, liver cancer and kidney cancer show high level of ALDH1A1 (Fig. 8d, f), whereas breast cancer (Fig. 8a), ovary cancer (Fig. 8c), skin cancer (Fig. 8e), pancreatic cancer (Fig. 8g), and esophagus cancer (Fig. 8h) express higher level of ALDH1A3. Here, ALDH1A1 is linked to breast cancer.