1. World Health Organization (2006) Neurological disorders: public health challenges. WHO Press, World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland. https://www.who.int/mental_health/publications/neurological_disorders_ph_challenges/en/. Accessed 1 Oct 2019
2. Gelfand JM (2014) Chapter 12 - Multiple sclerosis: diagnosis, differential diagnosis, and clinical presentation. In: Goodin DS (ed) Handbook of clinical neurology, vol 122. Elsevier, Amsterdam, pp 269–290
3. Ziemssen T (2011) Symptom management in patients with multiple sclerosis. J Neurol Sci 311:S48–S52
4. Zwibel HL, Smrtka J (2011) Improving quality of life in multiple sclerosis: an unmet need. Am J Managed Care 17(5):S139–S145
5. Tobin WO (2019) Management of multiple sclerosis symptoms and comorbidities. Continuum (Minneap Minn) 25(3):753–772