BibTex format
@article{Nacul:2011,
author = {Nacul, L and Soljak, M and Samarasundera, E and Hopkinson, NS and Lacerda, E and Indulkar, T and Flowers, J and Walford, H and Majeed, A},
pages = {108--116},
title = {COPD in England: a comparison of expected, model-based prevalence and observed prevalence from general practice data},
url = {http://jpubhealth.oxfordjournals.org/content/33/1/108.abstract%20http://jpubhealth.oxfordjournals.org/content/33/1/108.full},
volume = {33},
year = {2011}
}