Hungarian physician Endre Mester (1903–1984) was a pioneer of laser medicine, including the use of low level laser therapy (LLLT). In 1967, only a few years after the first working laser was invented, he started his experiments with the effects of lasers on skin cancer. He is credited as the discoverer of positive biological effects of low power lasers.
Read more about Endre Mester: Early Life, Later Career, Laser Research, Prominent Positions