Fig. 1

Flowchart. CRT: Chemoradiotherapy, LLLT: Low-Level Laser Therapy, OM: Oral Mucositis, Reasons of exclusion: - Patients without complete chemoradiotherapy, - Patients with exclusion criteria. Randomisation was still well balanced despite the exclusion of 14 patients. Only 51 patients were treated by lasertherapy (active or inactive): no imbalance was observed between the LLLT groups