Albuquerque RG, Rocha MAD, Hirotsu C, Hachul H, Bagatin E, Tufik S, Andersen ML
A randomized comparative trial of a combined oral contraceptive and azelaic acid to assess their effect on sleep quality in adult female acne patients
Arch Dermatol Res307:905-15.307:905-15.doi: 10.1007/s00403-015-1600-0