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. 2014 Oct 23;14:91. doi: 10.1186/1472-6947-14-91

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© Sampathkumar et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Model of a forum message containing drug and side-effect information. A forum message containing mentions of drug and its associated side-effects is modeled using an Hidden Markov Model. The presented model represents an ergodic HMM where every state is connected to every other state including itself and allows for transitions between each of them. This models a forum post where the mentions of drug names, side-effects, keywords and other words can appear in any sequence with possibilities for repetition.