BibTex format
@article{Ruiz:2015:10.1371/journal.pone.0145372,
author = {Ruiz, M and Bottle, A and Long, S and Aylin, P},
doi = {10.1371/journal.pone.0145372},
journal = {PLOS One},
title = {Multi-morbidity in hospitalised older patients: who are the complex elderly?},
url = {http://dx.doi.org/10.1371/journal.pone.0145372},
volume = {10},
year = {2015}
}