Demographic data
Fifteen healthy and pain-free men with a mean (SD) age of 24.1 (3.4) years and 15 age-matched healthy and pain-free women with a mean (SD) age of 25.1 (2.6) years participated in this study.The Kruskall-Wallis one-way ANOVA on ranks did not show any differences in psychosocial state between the different types of chocolate (