Richard J. Lamont 1*, Hyun Koo2* and George Hajishengallis 3*
1Department of Oral Immunology and Infectious Diseases, School of Dentistry, University of Louisville, Louisville, KY, USA.
2Department of Orthodontics and Divisions of Pediatric Dentistry and Community Oral Health, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.
3Department of Microbiology, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.
*Correspondence to Richard J. Lamont or Hyun Koo or George Hajishengallis