Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) LEXELL J,"What is the cause of the ageing atrophy? Total number, size and proportion of different fiber types studied in whole vastus lateralis muscle from 15- to 83-year-old men",J Neurol Sci,,,1988,84,,275-294,https://cir.nii.ac.jp/crid/1573950399051441280,