1. Primary Care & Interventions Unit, PHE, Gloucester, UK
2. Université Côte d’Azur, Centre Hospitalier Universitaire de Nice, Département de Santé Publique, Nice, France
3. National School of Public Health, Athens, Greece
4. Statens Serum Institut, Copenhagen, Denmark
5. Studienseminar Gymnasien Kassel, Kassel, Germany
6. University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Basque Country, Spain
7. Department of Education, Government of the Basque Country, Lakua C/Donostia-San Sebastián, Vitoria-Gasteiz, Basque Country, Spain
8. Istituto Superiore di Sanità, Rome, Italy