Combination of red and blue light therapy with acne film coating in treatment of moderate and severe acne.

Objective To evaluate the efficacy of combined red and blue light therapy with acne film coating in treatment of moderate and severe acne. Methods Totally 547 patients with moderate or severe acne were enrolled in the study from March 2012 to July 2014. Using open control, according to the cycle of time sequence will patients were divided into three groups: 183 patients (study group) were received alternatively red and blue light therapy...