Prevalence of pre-operative undiagnosed cognitive impairment and its association with handgrip strength, oral hygiene, and nutritional status in older elective surgical patients in Japan. - Nakatani, Shohei; Ida, Mitsuru; Uyama, Kayo; Kinugasa, Yuki; Kawaguchi, Masahiko (Journal of Anesthesia, 2023)