Figure 1 : Mean values and standard errors of pain ratings (0-100%) over the three trials and under application of tonic
heat pain of equal intensity during the 5-minute-periode (all correlations between repeated measurement time points
and trials are significant; p<0.001, r>0.72).

Gebhardt et al.Pain and Relief Reports  2014 1:1DOI : 10.7243/2057-3219-1-1