1 Department of Infectious Diseases and Vaccinology, University of Basel Children's Hospital, Basel, Switzerland. Electronic address: [email protected].
2 Department of Infectious Diseases and Vaccinology, University of Basel Children's Hospital, Basel, Switzerland.
3 Swissnoso, the National Centre for Infection Control, Bern, Switzerland; Department of Infectious Diseases, Thurgau Cantonal Hospital, Frauenfeld, Switzerland.
4 Swissnoso, the National Centre for Infection Control, Bern, Switzerland; Department of Infectious Diseases, University Hospital Basel, Basel, Switzerland.
5 Department of Infectious Diseases and Vaccinology, University of Basel Children's Hospital, Basel, Switzerland; Swissnoso, the National Centre for Infection Control, Bern, Switzerland.