1. School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
2. Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
3. Clinical Research Center, Qingdao Municipal Hospital, Qingdao, China
4. Department of Gastroenterology, Qingdao Municipal Hospital Group, Qingdao, China