BibTex format
@article{Calderón-Larrañaga:2011,
author = {Calderón-Larrañaga, A and Carney, L and Soljak, M and Bottle, A and Partridge, M and Bell, D and Abi-Aad, G and Aylin, P and Majeed, A},
pages = {191--196},
title = {Association of population and primary healthcare factors with hospital admission rates for chronic obstructive pulmonary disease in England: national cross-sectional study},
url = {http://thorax.bmj.com/content/66/3/191.abstract},
volume = {66},
year = {2011}
}