Corresponding Author

Hom-Lay Wang

Graduate Periodontics, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI

Correspondence

Hom-Lay Wang, Professor and Director of Graduate Periodontics, Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, 1011 North University Ave., Ann Arbor, MI 48109-1078, USA

Email: homlay@umich.edu