Characterisation of swabbing for virological analysis in the Spanish Influenza Sentinel Surveillance System during four influenza seasons in the period 2002-2006
Larrauri, A and De Mateo, S and Spanish Influenza Sentinel Surveillance System, Eurosurveillance, 12, 706 (2007), https://doi.org/10.2807/esm.12.05.00706-en