Laser physics.
D001128:Argon; D002245:Carbon Dioxide; D055590:Electromagnetic Phenomena; D006801:Humans; D053685:Laser Therapy; D007834:Lasers; D010038:Otorhinolaryngologic Diseases / Q000601:surgery; D055585:Physical Phenomena; D010825:Physics; D011827:Radiation; D012542:Scattering, Radiation
D002245:Carbon Dioxide; D001128:Argon