1. State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.
2. Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, Maryland.
3. Department of Orthopedic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
4. Center for Stem Cell Biology and Regenerative Medicine, University of Maryland School of Medicine, Baltimore, Maryland.
5. Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland.
6. Mechanical Engineering Department, University of Maryland, Baltimore County, Maryland.