Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kimura Hiroaki and Miura Juichi and Wadayama Bunichiro,"Fusion rates of PLIF using expandable cage for pear-shaped discs, a risk factor of cage retropulsion",Journal of Spine Research,1884-7137,The Japanese Society for Spine Surgery and Related Research,2021-10-20,12,10,1228-1234,https://cir.nii.ac.jp/crid/1390852724619081472,https://doi.org/10.34371/jspineres.2021-1002