Pigmentation Disorders Treatment Market, By Disorder Type (Melasma, Vitiligo, Albinism, Post-Inflammatory Hyperpigmentation (PIH), and Others), By Drug Type (Corticosteroids, Calcineurin Inhibitors, Janus kinase inhibitor, Melanin Synthesis Inhibitor, and Others), By Route of Administration (Oral, Topical, and Other), By Distribution Channel (Hospital Pharmacies, Retail Pharmacies, and Online Pharmacies), By Geography (North America, Latin America, Europe, Asia Pacific, Middle East & Africa)