BibTex format
@inproceedings{Greenfield:2015:10.1016/S0140-6736(15)00878-8,
author = {Greenfield, G and Ramzan, FA and Newson, RB and Majeed, A and Gnani, S},
doi = {10.1016/S0140-6736(15)00878-8},
pages = {S40--S40},
publisher = {ELSEVIER SCIENCE INC},
title = {Frequent attendances to National Health Service general practitioner-led urgent care centres in London: an observational study},
url = {http://dx.doi.org/10.1016/S0140-6736(15)00878-8},
year = {2015}
}