In Vitro and Ex Vivo Evaluation of Fluocinolone Acetonide–Acitretin-Coloaded Nanostructured Lipid Carriers for Topical Treatment of Psoriasis oleh Hassan Raza, Shefaat Ullah Shah, Zakir Ali, Atif Ullah Khan, Irfa Basharat Rajput, Arshad Farid, Mohammed Al Mohaini, Abdulkhaliq J. Alsalman, Maitham A. Al Hawaj, Saima Mahmood, Abid Hussain, Kifayat Ullah Shah