1. Jinan Stomatological Hospital East Branch, Jinan Stomatological Hospital, Jinan, China
2. Department of Periodontology, Jinan Stomatological Hospital, Jinan, China
3. Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
4. Hospital Infection Management Office, Jinan Stomatological Hospital, Jinan, China