Financial & competing interests disclosure
BE Cairns is the recipient of a 2012 Pain Research Award from Pfizer Canada. P Gazerani’s research is supported by a 2010 FSS grant from the Danish Research Council. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.