1. Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Harbin Medical University, 23 Youzheng Street, Nangang District, Harbin 150001, People’s Republic of China
2. Shanghai Key Laboratory of Stomatology, Department of Oral and Maxillofacial Surgery, The Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, People’s Republic of China