[1] STATE SERUM INST,NATL CTR HOSP HYG,COPENHAGEN,DENMARK
[2] INST HYG & EPIDEMIOL,B-1050 BRUSSELS,BELGIUM
[3] FAC XAVIER BICHAT,DEPT SANTE PUBL,F-75018 PARIS,FRANCE
[4] UNIV FREIBURG KLINIKUM,FREIBURG,GERMANY
[5] EVANGELISMOS MED CTR,DEPT MICROBIOL,ATHENS,GREECE
[6] MATER MISERICORDIAE HOSP,DUBLIN 7,IRELAND
[7] ST JAMES HOSP,DUBLIN 8,IRELAND
[8] OSPED POLICLIN ST ORSOLA MALPIGHI,IST ANESTESIOL RIANIMAZ,BOLOGNA,ITALY
[9] CTR HOSP LUXEMBOURG,SERV ANESTHESIE REANIM,LUXEMBOURG,LUXEMBOURG
[10] UNIV AMSTERDAM,DEPT MICROBIOL,AMSTERDAM,NETHERLANDS
[11] MINIST SAUDE,GABINETO SECRETARIO ESTADO ADM SAUDE,LISBON,PORTUGAL
[12] UNIV HOSP GETAFE,UNIDAD CUIDADOS INTENS,GETAFE,MADRID,SPAIN
[13] UNIV AUTONOMA MADRID,CTR UNIV SALUD PUBL,MADRID,SPAIN
[14] STATENS BAKTERIOL LAB,STOCKHOLM,SWEDEN
[15] HOP CANTONAL FRIBOURG,SERV ANESTESIOL & REANIMAT,FRIBOURG,SWITZERLAND
[16] UNIV BIRMINGHAM,DUDLEY RD HOSP,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND
[17] PUBL HLTH LAB SERV,DIV HOSP INFECT,LONDON,ENGLAND
[18] WHO,QUAL CARE & TECHNOL PROGRAMME,COPENHAGEN,DENMARK
[19] HOP ST JOSEPH,SERV REANIMAT,F-75674 PARIS,FRANCE
[20] CTR HOSP LYON SUD,UNITE HYG & EPIDEMIOL,LYON,FRANCE