Fig. 3From: Low-level laser therapy in treatment of chemoradiotherapy-induced mucositis in head and neck cancer: results of a randomised, triple blind, multicentre phase III trialPain assesment – at the first and at the last lasertherapy session - Per protocol analysis. Arm A: active Lasertherapy arm - Arm B: control placebo arm (Laser-off treatment), VAS: Visual Analogue Scale: A numeric pain rating scale was used (0: ‘No pain’ to 10: ‘Worst pain possible’)Back to article page