Influenza vaccine effectiveness in Spain 2013/14: subtype-specific early estimates using the cycEVA study Jiménez-Jorge, S and Pozo, F and de Mateo, S and Delgado-Sanz, C and Casas, I and García-Cenoz, M and Castilla, J and Sancho, R and Etxebarriarteun-Aranzabal, L and Quiñones, C and Martínez, E and Vega, T and Garcia, A and Giménez, J and Vanrell, J M and Castrillejo, D and Larrauri, A and on behalf of Spanish Influenza Sentinel Surveillance System (SISS), Eurosurveillance, 19, 20727 (2014), https://doi.org/10.2807/1560-7917.ES2014.19.9.20727