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Case 4, tattoo on the upper arm. (a) Before treatment, (b) After 3 times treatment by Pico-Alex, (c) After 5 times treatment by Pico-Alex, (d) One month after five Pico-Alex plus one Pico-YAG (532) treatment. (For interpretation of the references to color in this figure legend, the reader is refered to the web version of this article.)
