1. Department of Pharmacy; Shanghai Jiao Tong University Affiliated Sixth People's Hospital; Shanghai 200233 China
2. School of Pharmacy; Shanghai Jiao Tong University; Shanghai 200240 China
3. Department of Biochemical Pharmacy; College of Pharmacy; Second Military Medical University; Shanghai 200433 China
4. Department of Gastroenterology; Shanghai Changzheng Hospital; Second Military Medical University; Shanghai 200003 China