Comparison of efficacy of topical 2% liquiritin, topical 4% liquiritin and topical 4% hydroquinone in the management of melasma. J Pak Assoc Dermatol [Internet]. 2016 Dec. 24 [cited 2026 Jul. 23];19(3):158-63. Available from: https://www.jpad.com.pk/index.php/jpad/article/view/533