[1] Univ Helsinki, Dept Anat Biomedicum, Helsinki, Finland
[2] Univ Helsinki, Dept Oral Pathol, Inst Dent, Helsinki, Finland
[3] Univ Helsinki, Cent Hosp, Oral Pathol Unit Lab Diagnost, Helsinki, Finland
[4] Univ Helsinki, Inst Dent, Helsinki, Finland
[5] Univ Helsinki, Cent Hosp, Microbiol Unit Lab Diagnost, Helsinki, Finland
[6] Univ Helsinki, Dept Bacteriol & Immunol, Haartman Inst, Helsinki, Finland
[7] Univ Helsinki, Cent Hosp, Dept Med Invartes Med, Helsinki, Finland
[8] ORTON Orthopaed Hosp Invalid Fdn, Helsinki, Finland
[9] COXA Joint Replacement Hosp, Tampere, Finland