1. PhD candidate, Department of Orthodontics, School & Hospital of Stomatology, Shandong University, Jinan, Shandong, China.
2. Undergraduate student, School of Stomatology, Wenzhou Medical University, Lu Cheng District, Wenzhou, Zhejiang, China.
3. Attending Physician, Department of Pedodontics, School of Stomatology, Wenzhou Medical University, Wenzhou, Zhejiang, China.
4. Professor, Department of Orthodontics, School & Hospital of Stomatology, Shandong University, Jinan, Shandong, China.