1. Department of Periodontology School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration Jinan Shandong China
2. Department of Stomatology Linyi People's Hospital Linyi Shandong Province China
3. Department of Stomatology The Second Hospital, Cheeloo College of Medicine, Shandong University Jinan Shandong Province China