1. Department of PediatricsUniversity of WürzburgWürzburgGermany
2. Institute of Hygiene and MicrobiologyUniversity of WürzburgWürzburgGermany
3. Department of Medical MicrobiologyNational Reference Center for StreptococciUniversity Hospital RWTH AachenAachenGermany
4. Children's HospitalGoethe University of FrankfurtFrankfurtGermany