For citations:

Bakulin I.S., Zakroyschikova I.V., Suponeva N.A., Zakharova M.N. Amyotrophic lateral sclerosis: Clinical heterogeneity and approaches to classification. Neuromuscular Diseases. 2017;7(3):10-20. (In Russ.) https://doi.org/10.17650/2222-8721-2017-7-3-10-20