Severe disease due to group A streptococcus in Belgium Hanquet, G and Goossens, H and Top, G and Pirenne, Yvo and Gilbert, V and De Schrijver, K and Vergison, A and Ducoffre, G and Van Cleemput, Els and Suetens, C, Weekly releases (1997–2007), 8, 2491 (2004), https://doi.org/10.2807/esw.08.26.02491-en