[1] INST MERIEUX MARCY ETOLIE,F-69260 CHARBONNIERS,FRANCE
[2] BORAS HOSP,DEPT PEDIAT,BORAS,SWEDEN
[3] GOTHENBURG UNIV,DEPT INFECT DIS,S-41124 GOTHENBURG,SWEDEN
[4] GOTHENBURG UNIV,INST MED MICROBIOL,S-41124 GOTHENBURG,SWEDEN
[5] UMEA UNIV,DEPT INFECT DIS,S-90187 UMEA,SWEDEN
[6] VASTRA FROLUNDA HOSP,PEDIAT OUT PATIENT CLIN,VASTRA FROLUNDA,SWEDEN