Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ota Kiyobumi and Koseki Sayo and Ikegami Kenji and Onishi Iichiroh and Tomimitsu Hiyoryuki and Shintani Shuzo,Dropped head syndrome as first manifestation of primary hyperparathyroid myopathy,Rinsho Shinkeigaku,0009-918X,Societas Neurologica Japonica,2018,58,3,193-197,https://cir.nii.ac.jp/crid/1390001205039055616,https://doi.org/10.5692/clinicalneurol.cn-001125