MRI grading of spinal stenosis is not associated with the severity of low back pain in patients with lumbar spinal stenosis oleh Masakazu Minetama, Mamoru Kawakami, Masatoshi Teraguchi, Sachika Matsuo, Yoshio Enyo, Masafumi Nakagawa, Yoshio Yamamoto, Tomohiro Nakatani, Nana Sakon, Wakana Nagata, Yukihiro Nakagawa