Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) CHOSA Etsuo and 田島 直也 and 松元 征徳 and 黒木 浩史 and 後藤 啓輔,An epidemiological study of occupational low back pain,The Journal of Japanese Society of Lumbar Spine Disorders,13459074,The Japanese Society of Lumbar Spine Disorders,2001,7,1,100-104,https://cir.nii.ac.jp/crid/1390282679416367104,https://doi.org/10.3753/yotsu.7.100