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Journal Article PARKINSONISM-DEMENTIA COMPLEX, AN ENDEMIC DISEASE ON THE ISLAND OF GUAM: I. CLINICAL FEATURES Get access ASAO HIRANO, ASAO HIRANO Search for other works by this author on: Oxford Academic PubMed Google Scholar LEONARD T. KURLAND, LEONARD T. KURLAND Search for other works by this author on: Oxford Academic PubMed Google Scholar ROBERT S. KROOTH, ROBERT S. KROOTH Search for other works by this author on: Oxford Academic PubMed Google Scholar SIMMONS LESSELL SIMMONS LESSELL Search for other works by this author on: Oxford Academic PubMed Google Scholar Brain, Volume 84, Issue 4, December 1961, Pages 642–661, https://doi.org/10.1093/brain/84.4.642 Published: 01 December 1961
Hirano et al. (Sun,) studied this question.