1. Department of Orthodontics, School and Hospital of Stomatology, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China (mainland)
2. Department of Oral and Maxillofacial, School and Hospital of Stomatology, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China (mainland)
3. Department of Orthodontics, Jinan Stomatological Hospital, Jinan, Shandong, China (mainland)
4. Department of Orthodontics, School of Stomatology, Jining Medical University, Jining, Shandong, China (mainland)