[1] Univ Helsinki, Haartman Inst, Dept Med Genet, Helsinki, Finland
[2] Univ Helsinki, Cent Hosp, Diagnost Lab, Helsinki, Finland
[3] Univ Helsinki, Haartman Inst, Dept Bacteriol & Immunol, Helsinki, Finland
[4] Univ Helsinki, Biomed Biochip Ctr, Helsinki, Finland