Selvadurai, L. P., Perlman, S. L., Wilmot, G. R., Subramony, S. H., Gomez, C. M., Ashizawa, T., Paulson, H. L., Onyike, C. U., Rosenthal, L. S., Sair, H. I., Kuo, S.-H., Ratai, E.-M., Zesiewicz, T. A., Bushara, K. O., Öz, G., Dietiker, C., Geschwind, M. D., Nelson, A. B., Opal, P., … Schmahmann, J. D. (2022). The S-Factor, a New Measure of Disease Severity in Spinocerebellar Ataxia: Findings and Implications. The Cerebellum, 22(5), 790–809. https://doi.org/10.1007/s12311-022-01424-1