“…Phototherapy, such as laser therapy or linear polarized near-infrared ray (LPNR) irradiation, is one therapeutic approach that has been shown to be effective 1 , 2 ) . The equipment required for LPNR irradiation is a phototherapy device that emits infrared rays at deep penetrating wavelengths (600–1,600 nm) 3 , 4 , 5 , 6 , 7 ) . LPNR irradiation is commonly used in various therapeutic scenarios because of its noninvasiveness, safety, and simplicity 2 , 4 , 5 , 6 , 8 , 9 , 10 ) .…”