1. Department of Oral and Maxillofacial Surgery The Affiliated Hospital of Qingdao University Qingdao China
2. School of Stomatology of Qingdao University Qingdao China
3. The Traditional Chinese Medicine Hospital of Huangdao Distract Qingdao China
4. Key Lab of Oral Clinical Medicine The Affiliated Hospital of Qingdao University Qingdao China
5. Department of Endodontics The Affiliated Hospital of Qingdao University Qingdao China
6. Department of Gastroenterology The Affiliated Hospital of Qingdao University Qingdao China