copyright Sameer Singh
https://www.washingtonpost.com/news/to-your-health/wp/2016/05/19/do-our-genes-remember-pain-scientists-suspect-they-might/?utm_term=.e97fd33b6473
http://www.dailymail.co.uk/health/article-3587283/Why-DOES-chronic-pain-exist-Scientists-agony-persists-injury-caused-gone.html
PC12 cells
http://painresearchforum.org/news/68007-leaving-mark-changes-epigenome-during-chronic-pain
http://www.painresearchforum.org/news/53767-future-epigenetics-pain-research
http://www.painresearchforum.org/forums/webinar/52055-webinar-pain-epigenetics-current-research-and-future-challenges
