1 Paediatric Infectious Diseases Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK; Paediatric Pharmacology, University of Basel Children's Hospital, Basel, Switzerland.
2 Paediatric Infectious Diseases Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK.
3 Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands.
4 Primary Care Center "Pare Claret", Catalan Institute of Health, Barcelona, Spain.
5 Medical Faculty, European University of Cyprus, Nicosia, Cyprus.
6 Studio Pediatrico Vecellio 33, ULSS 16, Padua, Italy.