1. Hospital of Stomatology, The First Affiliated Hospital of Jinan University, Jinan University , No. 613, West Huangpu Avenue, Tianhe District, Guangzhou City, Guangdong Province 510630 , China
2. College of Stomatology, Jinan University , No. 601, West Huangpu Avenue, Tianhe District, Guangzhou City, Guangdong Province 510632 , China
3. Department of Stomatology, The Sixth Affiliated Hospital of Jinan University , No. 88, Changdong Avenue, Changping Town, Dongguan City, Guangdong Province 523573 , China
4. Chaoshan Hospital, The First Affiliated Hospital of Jinan University , No. 161, Caichang Avenue, Raoping County, Chaozhou City, Guangdong Province 515600 , China