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Radial artery transcutaneous irradiation using (A) pen-shaped dual-wavelength low intensity level laser (Laser Duo, MMO, Brazil; 660 nm and 808 nm, 100 mW/each, spot size = 0.03 cm2) and a prototype bracelet-shaped single-wavelength low intensity level laser (660 nm, 100 mW, spot size = 4.0 cm2; LAT, São Carlos Physics Institute).
