Efficacy of ultraviolet B radiation versus vitamin D on postural control and cognitive functions in relapsing-remitting multiple sclerosis: A randomized controlled study.

Background: The relapsing-remitting multiple sclerosis (RRMS) is the most common type of MS with prevalence rate 20-60 patients/100.000 individuals in Egypt. Poor postural control and cognitive dysfunctions are well-established complications of RRMS without potent remedy yet.