1. Department of Gastroenterology The Affiliated Hospital of Qingdao University Qingdao 266003 China
2. School of Rehabilitation Sciences and Engineering University of Health and Rehabilitation Sciences Qingdao 266 071 China
3. Department of Gastroenterology The Affiliated Hospital of Qingdao University Hainan Branch Hainan 572 400 China
4. Zhejiang Engineering Research Center for Tissue Repair Materials Wenzhou Institute University of Chinese Academy of Sciences Wenzhou Zhejiang 325 000 China
5. Tianjin Enterprise Key Laboratory for Application Research of Hyaluronic Acid Tianjin 300 038 China