[1] Sheehand Dare RA, Cotterill JA. Lasers in dermatology. Br J Dermatol, 1993,129:1-8. [2] Kilmer SL. Laser treatment of tattoo. Dermatol Clin, 1997,15:409-417. [3] Leuenberger ML, Mulas MW, Hata TR, et al. Comparison of the Q switched alexandrite, Nd:YAG, and ruby lasers in treating blue black tattoos.Dermatol Surg, 1999,25:10-14.