Comparison of the efficacy of Hydroquinone cream versus Hydroquinone cream plus Danggui Shaoyao powder in the treatment of melasma - Cheng, Yuan-Yuan; Peng, Rui-rui; Luo, Hao; Zhao, Wei (Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii, 2024)