They showed that in patients with oral mucositis following the utilization of Low-Level Laser Therapy (LLLT) (λ = 970 nm, power 2.5 W, irradiance 200 mW/cm2, fluence 6 J/cm2, time 30 s) resulted in a reduction in the level of 16 out of 29 pro-inflammatory cytokines (including IL-1a, IL-3, IL-2Ra, IL-8, IL-16, CTACK, GRO-a, MIG, HGF, b-NGF, M-CSF, LIF and TNF-β). Here, LIF is linked to oral mucositis.