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We evaluated the short-term and long-term effects of the 1550 nm erbium:glass (Er:glass) fractional laser in the treatment of facial acne vulgaris. Forty-five (9 male and 36 female) acne patients were treated 4 times at 4-week intervals with the following parameters: 169 spot density and 15–30 mJ/cm2 fluence. There was no control group. The laser spots were adjustable (maximum overlap: 20 %) according...
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