[1] Univ Med Ctr, Dept Infect Dis, Ljubljana 1525, Slovenia
[2] Univ Trnava, St Elisabeth Hosp, Bratislava, Slovakia
[3] Univ Zagreb, Univ Hosp Infect Dis, Zagreb, Croatia
[4] Univ Tartu, Childrens Hosp, EE-50090 Tartu, Estonia
[5] Dept Med & Infect Dis, Budapest, Hungary
[6] Inst Infect Dis & Trop Dis Belgrade, Belgrade, Serbia Monteneg, Serbia
[7] Clin Infect Dis, TFYR, Skopje, Macedonia
[8] Natl Inst Publ Hlth, Warsaw, Poland
[9] Children Univ, Clin Hosp, Riga, Latvia
[10] Med Acad Postgrad Educ, Kijev, Ukraine
[11] Natl Hosp Minist Interior, Inst Med, Sofia, Bulgaria
[12] Inst Antimicrobial Chemotherapy, Smolensk, Russia
[13] Infect Dis Clin, Cluj Napoca, Romania
[14] Res Inst Epidemiol & Microbiol, Minsk, BELARUS
[15] Vilnius State Univ, Childrens Hosp, Vilnius, Lithuania
[16] State Inst Drug Control, Prague, Czech Republic