Mehta, Tejas, et al. “Botulinum Toxin for the Treatment of Lower Limb Cramp Pain in Patients With Amyotrophic Lateral Sclerosis”. RRNMF Neuromuscular Journal, vol. 1, no. 1, May 2020, pp. 36-41, https://doi.org/10.17161/rrnmf.v1i1.13553.