4Sasaki A, Touma Y, Ishino Y, et al. Linear polarized near-infrared irradiation stimulates mechanical expansion of the rat sagittal suture. Luminescence, 2003,18:58-60.
5Demura S, Yamaji S, Ikemoto Y. Effect of linear polarized near-infrared light irradiation on flexibility of shoulder and ankle joints. J Sports Med Phys Fitness, 2002, 42:438-445.