“…In general, therefore, it seems that traumatic experiences are a factor of vulnerability for fibromyalgia sufferers. Nevertheless, the studies made show very different percentages of the presence of traumatic events in the history of fibromyalgia patients: 23% in the study of Greenfield, Fitzcharles, & Esdaile (Greenfield, Fitzcharles, & Esdaile, 1992); 35% in that of Riberto, Pato, & Battistella (Riberto, Pato, & Battistella, 2006); 47% in that of Fernandes et al (Fernandes et al, 2011); 60% in that of Gonzalez, Baptista, Branco, & Ferreira (Gonzalez, Baptista, Branco, & Ferreira, 2013); 65% in that of Anderberg et al (Anderberg et al, 2000); 71% in that of Haviland et al (Haviland et al, 2010); 91% in that of Walen, Oliver, Groessl, Cronan, & Rodriguez (Walen, Oliver, Groessl, Cronan, & Rodriguez, 2001); and 96% in that of Filippon et al (Filippon et al, 2013).…”