title: Letters From Our Readers.
authors: Department of Orthodontics, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China, lijuan@scu.edu.cn.
authors: Jiang
authors: J
authors: Fulin
authors: Department of Orthodontics, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China, lijuan@scu.edu.cn.
authors: Li
authors: L
authors: Juan