1. Institute of Virology and Antiviral Therapy, Friedrich Schiller University, Jena, Germany
2. Department of Health Sciences, University of Florence, Florence, Italy
3. The Discipline of Paediatrics and Adolescent Health, University of Sydney, Sydney, Australia
4. Division of Infectious Disease, Columbia University, New York, NY, USA
5. Department of Pediatrics, Santa Casa de Sao Paulo School of Medical Sciences, Sao Paulo, Brazil
6. Global Medical Affairs Rota & MMRV, GSK, Wavre, Belgium