[1] Finish Inst Occupant Hlth, Unit Excellence Immunotoxicol, Helsinki, Finland
[2] Univ Helsinki, Cent Hosp, Finish Inst Occupant Hlth, Team Biol Mech & Prevent Work Related Dis,Dept Pa, Helsinki, Finland
[3] Tampere Univ, Univ Hosp, Dept Dermatol, FIN-33101 Tampere, Finland
[4] Natl Publ Hlth Inst, Immunobiol Lab, Helsinki, Finland
[5] Finnish Inst Occupat Hlth, Control Hypersens Dis, Helsinki, Finland