1. Department of Periodontology, School of Dentistry, National Defense Medical Center and Tri-Service General Hospital, Taipei, Taiwan, Republic of China.
2. Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, Republic of China.
3. Department of Materials Science and Engineering, Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, Republic of China.
4. Center for Teeth Bank and Dental Stem Cell Technology and School of Dentistry, Taipei Medical University, Taipei, Taiwan.
5. Department of Dentistry, Taipei Tzu Chi General Hospital, Xindian, New Taipei City, Taiwan, Republic of China.