@article{formiga2013-23186603,
  author  = {Formiga, F. and Ferrer, A. and Sanz, H. and Marengoni, A. and Alburquerque, J. and Pujol, R. and {Octabaix study members}},
  title   = {{Patterns of comorbidity and multimorbidity in the oldest old: the Octabaix study}},
  journal = {European journal of internal medicine},
  year    = {2013},
  doi     = {10.1016/j.ejim.2012.11.003},
  pmid    = {23186603},
  url     = {https://doi.org/10.1016/j.ejim.2012.11.003}
}