1. Salivary Gland Disease Center and Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Beijing Laboratory of Oral Health and Beijing Stomatological Hospital, Capital Medical University, Beijing 100050, P. R. China
2. Academician Laboratory of Immune and Oral Development & Regeneration, Dalian Medical University, Lvshun South Road, Dalian 116044, P. R. China
3. School of Stomatology, Dalian Medical University, No. 9 West Section, Lvshunnan Road, Dalian 116044, P. R. China
4. School of Stomatology, Harbin Medical University, Harbin 150020, P. R. China
5. Department of VIP Dental Service, School of Stomatology, Capital Medical University, Beijing 100050, P. R. China
6. Laboratory for Oral and General Health Integration and Translation, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, P. R. China
7. Department of Stomatology, Stomatological Hospital Affiliated School of Stomatology of Dalian Medical University, No. 397 Huangpu Road, Shahekou District, Dalian 116086, P. R. China