Melasma: a comparative trial of azelaic acid (20%) cream alone and in combination with tretinoin (0.1%) cream. J Pak Assoc Dermatol [Internet]. 2017 Jan. 3 [cited 2026 Jul. 26];14(1):10-5. Available from: https://www.jpad.com.pk/index.php/jpad/article/view/770