Affiliation: | 1. Infectious Diseases Unit, Infanta Sofía Hospital, , Madrid, Spain;2. National Epidemiology Center, , Madrid, Spain;3. Ramón y Cajal Hospital, , Madrid, Spain;4. Virgen del Rocío Hospital, , Sevilla, Spain;5. Son Espases Hospital, Palma de Mallorca, , Spain;6. Donostia Hospital, , San Sebastián, Spain;7. La Paz University Hospital, , Madrid, Spain;8. Navarra Hospital, , Pamplona, Spain;9. Miguel Servet Hospital, , Zaragoza, Spain |