Ogasawara, Kouji, Susumu Nakajima, Hiroshi Sato, and Tadashi Sasaki. 2019. “Escherichia Coli Sterilization Using a Light-Emitting Diode and Methylene Blue”. Laser Therapy 28 (2): 97-102. https://doi.org/10.5978/islsm.28_19-OR-05.