1 Division of Gastroenterology and Hepatology, E-Da Cancer Hospital/I-Shou University, Kaohsiung, Taiwan. Electronic address: jftsai1171@gmail.com.
2 Division of Gastroenterology and Hepatology, E-Da Cancer Hospital/I-Shou University, Kaohsiung, Taiwan; School of Medicine, I-Shou University, Kaohsiung, Taiwan.