1. Laboratory of Pediatric Infectious Diseases; Radboud University Medical Center; Nijmegen; the Netherlands
2. Molecular Genetics Group; Groningen Biomolecular Sciences and Biotechnology Institute; Centre for Synthetic Biology; University of Groningen; Groningen; the Netherlands
3. German National Reference Center for Streptococci; Department of Medical Microbiology; University Hospital RWTH Aachen; Aachen; Germany