1. Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, China.
2. Department of Stomatology, Haiyuan College of Kunming Medical University, Kunming, China.
3. Shandong Provincial Key Laboratory of Oral Tissue Regeneration, Department of Oral and Maxillofacial Surgery, School of Stomatology, Shandong University, Jinan, China.