1. State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
2. State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
3. State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China