BibTex format
@article{Greaves:2013:10.2196/jmir.2721,
author = {Greaves, F and Ramirez-Cano, D and Millett, C and Darzi, A and Donaldson, L},
doi = {10.2196/jmir.2721},
journal = {JOURNAL OF MEDICAL INTERNET RESEARCH},
title = {Use of Sentiment Analysis for Capturing Patient Experience From Free-Text Comments Posted Online},
url = {http://dx.doi.org/10.2196/jmir.2721},
volume = {15},
year = {2013}
}