@article{20597,
  author = {Jenkins C. and Postma D. and Anzueto A. and Make B. and Similowski T. and Ostlund O. and Eriksson G. and Calverley P},
  title = {Factor analysis in predominantly severe COPD: Identification of disease heterogeneity by easily measurable characteristics.},
  year = {2013},
  journal = {Respiratory Medicine},
  volume = {107},
  edition = {15 Aug 2013},
  number = {12},
  pages = {1939-47},
  language = {eng},
}