Legionnaires' disease: when an 'outbreak' is not an outbreak Pereira, A J and Broadbent, J and Mahgoub, H and Morgan, O and Bracebridge, S and Reacher, M and Ibbotson, S and Lee, J. V. and Harrison, T G and Nair, P, Weekly releases (1997–2007), 11, 3089 (2006), https://doi.org/10.2807/esw.11.48.03089-en