1 Department of Medical Microbiology, Radboud UMC and Center for Infectious Diseases, Radboud UMC, Nijmegen, the Netherlands. Electronic address: [email protected].
2 Oxford University Clinical Research Unit, Dong Da, Hanoi, Viet Nam.
3 Department of Medical Microbiology and Experimental Bacteriology, Leiden University Medical Center and RIVM, Leiden, the Netherlands.