Khadka DK, Agrawal S, Dhali TK. Methotrexate plus narrow band ultraviolet B (NBUVB) versus methotrexate alone in the treatment of moderate to severe plaque psoriasis: A randomized clinical trial. Nepal J Dermatol Venereol & Leprol. 2016;13(1):12-23. doi:10.3126/njdvl.v13i1.14298