Figure 3

Pain, cold and warm intensities during the Thermal Grill testing, divided by triallelic 5-HTTLPR. Intensity of pain (A), cold (B) and warm (C) (VAS 0–100) to stimulation with 32°C, 10°C, 40°C and TG (10/40°C). Boxes: interquartile range, whiskers: 10% and 90% percentiles. No significant differences between groups (p >0.5, Mann–Whitney U-test).