[1] Univ Copenhagen, Sch Dent, Fac Hlth Sci, Sect Periodontol Microbiol & Community Dent, DK-2200 Copenhagen, Denmark
[2] Univ Copenhagen, Dept Int Hlth Immunol & Microbiol, Copenhagen, Denmark
[3] Univ Copenhagen Hosp, Rigshosp, Inst Inflammat Res, Dept Infect Dis & Rheumatol, DK-2100 Copenhagen, Denmark
[4] Wellesley Coll, Dept Biol Sci, Wellesley, MA 02181 USA
[5] Forsyth Inst, Dept Microbiol, Cambridge, MA USA
[6] Harvard Univ, Sch Dent Med, Dept Oral Med Infect & Immun, Boston, MA 02115 USA
[7] Univ Copenhagen, Fac Hlth Sci, Sect Cariol, Sch Dent, DK-2200 Copenhagen, Denmark