1. Oral & Maxillofacial Reconstruction and Regeneration of Luzhou Key Laboratory, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
2. Department of Pediatric Dentistry and Children's Stomatology, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China