1134-8046 1134-8046 S1134-80462018000300166 10.20986/resed.2017.3620/2017 Venezuela Venezuela Venezuela Venezuela Venezuela 00 06 2018 00 06 2018 25 3 166 169

2007 128 4 4 693-705 2012 7 2 2 119-30 2013 99 3 3 607-15 2005 280 23 23 21689-92 2014 13 9 9 673-91 2001 293 5532 5532 1068-70 1998 280 2 2 147-51 2017 7 41221 Pain Research Forum 2015 2015 7 2 2 235-45 2016 32 2 2 101-13