Severi Ettore, Vennema Harry, Takkinen Johanna, Lopalco Pier Luigi, Coulombier Denis
European Centre for Disease Prevention and Control, Stockholm, SE-17183, Sweden.
National Institute for Public Health and the Environment, Bilthoven, Netherlands.
Lancet Infect Dis. 2015 Jun;15(6):632-4. doi: 10.1016/S1473-3099(15)00021-3. Epub 2015 May 17.