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Nakagawa, K.; Kataoka, H.; Inoue, R.; Goto, K.; Yamashita, J.; Nishi, Y.; Honda, Y.; Sakamoto, J.; Origuchi, T.; Okita, M. Usefulness of Muscle Stiffness Evaluated by Ultrasonography for Detecting Muscle Change Related to Contracture in Frail Older Adults. Can Geriatr J 2025, 28, 212-220.