1. Graduate Institute of Oral Biology, College of Medicine National Taiwan University Taipei Taiwan
2. Department of Dentistry National Taiwan University Hospital Hsin‐Chu Branch Hsin‐Chu Taiwan
3. Graduate Institute of Photonics and Optoelectronics National Taiwan University Taipei Taiwan
4. Department of Dentistry, College of Medicine National Taiwan University Taipei Taiwan
5. Department of Dentistry National Taiwan University Hospital Taipei Taiwan