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APA Citation
Rushforth, B. (2009). efficacy of a combined oral contraceptive containing 0.030 mg ethinylestradiol/2 mg dienogest for the treatment of papulopustular acne in comparison with placebo and 0.035 mg ethinylestradiol/2 mg cyproterone acetate. Journal of family planning and reproductive health care, 35(3), 150. http://access.bl.uk/ark:/81055/vdc_100143577390.0x000010