BibTex format
@article{Lord:2012:10.1186/1471-2466-12-69,
author = {Lord, VM and Hume, VJ and Kelly, JL and Cave, P and Silver, J and Waldman, M and White, C and Smith, C and Tanner, R and Sanchez, M and Man, WD-C and Polkey, MI and Hopkinson, NS},
doi = {10.1186/1471-2466-12-69},
journal = {BMC Pulmonary Medicine},
title = {Singing classes for chronic obstructive pulmonary disease: a randomized controlled trial},
url = {http://dx.doi.org/10.1186/1471-2466-12-69},
volume = {12},
year = {2012}
}