[1] Univ Verona, Dept Pathol, I-37134 Verona, Italy
[2] Natl Publ Hlth Inst, Warsaw, Poland
[3] Grp Hosp Pitie Salpetriere, Bacteriol Lab, F-75634 Paris, France
[4] Cent Hosp Vaxjo, Vaxjo, Sweden
[5] Elisabethinen Hosp, Dept Hyg Microbiol & Trop Med, Linz, Austria
[6] Smolensk State Med Acad, Dept Clin Pharmacol, Smolensk, Russia
[7] Hosp Univ Ramon y Cajal, Microbiol Serv, Madrid, Spain