Prospective study of the incidence, aetiology and outcome of adult lower respiratory tract illness in the community
J Macfarlane, W Holmes, P Gard, R Macfarlane, D Rose, V Weston, M Leinonen, P Saikku, S Myint
Thorax Feb 2001, 56 (2) 109-114; DOI: 10.1136/thorax.56.2.109