Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) WILLIAMS GJ,Comparative accuracy of renal duplex sonographic parameters in the diagnosis of renal artery stenosis : paired and unpaired analysis,Am J Roentgenol,,,2007,188,,798-811,https://cir.nii.ac.jp/crid/1572261549899299712,