22.
Aoki Y, Sugiura S, Nakagawa K, Nakajima A, Takahashi H, Ohtori S, et al. Evaluation of nonspecific low back pain using a new detailed visual analogue scale for patients in motion, standing, and sitting: characterizing nonspecific low back pain in elderly patients. Pain Res Treat. 2012;2012:680496; doi: 10.1155/2012/680496.