Characteristics of Non-intubated Older Adult Patients With COVID-19 and Decreased Feeding and Swallowing Function and Their Association With Length of Hospital Stay. - Tanaka S; Goto K; Sakaki K; Harayama E; Suzuki Y; Ikenaga C; Kumagae K; Oyabu H; Otsuka M; Yamauchi K (Cureus, 2025)