1. Key Laboratory of Oral Diseases of Gansu Province, Key Laboratory of Stomatology of State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou, 730000, Gansu Province, China
2. Linyi Central Hospital, Linyi, 276000, Shandong Province, China
3. Gansu Academy of Light Industry, Lanzhou, 730000, Gansu Province, China
4. Sichuan Province Building Hospital, Chengdu, 610000, Sichuan Province, China