RT Journal Article SR Electronic(1) A1 Uphoff, H A1 Cohen, J M A1 Fleming, D M A1 Noone, A YR 2003 T1 Harmonisation of national influenza surveillance morbidity data from EISS: a simple index JF Eurosurveillance VO 8 IS 7 SP 156SP 420 OP 164 DO https://doi.org/10.2807/esm.08.07.00420-en UL https://www.eurosurveillance.org/content/10.2807/esm.08.07.00420-en