1. Chinese Medical College, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
2. Xinglin College, Liaoning University of Traditional Chinese Medicine, Shenyang 110167, China
3. Department of Diagnostic Sciences, Arthur Dugoni School of Dentistry, University of the Pacific, Stockton, CA, USA
4. Department of Surgery, Handan First Hospital, Handan 056000, China
5. Department of Oral Medicine, Peking University School and Hospital of Stomatology, Beijing 100081, China