Efficacy of topical 4% liquiritin compared with topical 4% liquiritin mixed in 5% ascorbic acid in the treatment of melasma. J Pak Assoc Dermatol [Internet]. 2016 Dec. 15 [cited 2026 Jul. 28];23(2):149-52. Available from: https://www.jpad.com.pk/index.php/jpad/article/view/298