Maleki, Marzieh, et al. “Assessment of the Risk of Falls Related to Imbalance Among Patients With Multiple Sclerosis Referred to the MS Society of Tehran 2014”. Advances in Nursing & Midwifery, vol. 25, no. 90, Feb. 2016, pp. 1-8, doi:10.22037/anm.v25i90.11358.