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Cho HJ, Shin JH, Park YE, et al. Characteristics of spinal and bulbar muscular atrophy in south Korea: a cross-sectional study of 157. Brain 146: 1083-1092, 2023.","DOI":"10.1093\/brain\/awac198"},{"key":"2","doi-asserted-by":"crossref","unstructured":"2. Atsuta N, Watanabe H, Ito M, et al. Natural history of spinal and bulbar muscular atrophy (SBMA): a study of 223 Japanese patients. Brain 129: 1446-1455, 2006.","DOI":"10.1093\/brain\/awl096"},{"key":"3","doi-asserted-by":"publisher","unstructured":"3. Taniguchi H, Nakayama H, Hori K, et al. Esophageal involvement in multiple system atrophy. Dysphagia 30: 669-673, 2015.","DOI":"10.1007\/s00455-015-9641-2"},{"key":"4","doi-asserted-by":"crossref","unstructured":"4. Banno H, Katsuno M, Suzuki K, et al. Swallowing markers in spinal and bulbar muscular atrophy. Ann Clin Transl Neurol 4: 534-543, 2017.","DOI":"10.1002\/acn3.425"},{"key":"5","doi-asserted-by":"crossref","unstructured":"5. Hashizume A, Banno H, Katsuno M, et al. 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