1. Liaoning Provincial Key Laboratory of Oral Diseases, Department of Oral Biology, School and Hospital of Stomatology, China Medical University, Nanjing North Street 117, Shenyang, Liaoning 110002, China
2. Liaoning Provincial Key Laboratory of Oral Diseases, Department of Periodontics, School and Hospital of Stomatology, China Medical University, Nanjing North Street 117, Shenyang, Liaoning 110002, China