@misc{9624,
  author = {C. Salisbury and L. Johnson and S. Purdy and J. Valderas and A. Montgomery},
  title = {Epidemiology and impact of multimorbidity in primary care: a retrospective cohort study},
  year = {2011},
  journal = {Br J Gen Pract},
  volume = {61},
  number = {582},
  pages = {12-21},
  issn = {0960-1643},
  doi = {10.3399/bjgp11X548929},
}