Impact of ICU Length of Stay and Illness Severity on Rehabilitation Progress and Functional Recovery: A Secondary Analysis of the Japanese Rehabilitation and Risk Factors on the Post-Intensive Care Syndrome (J-RELIFE) Prospective Registry. - Yanagita Y; Iida Y; Watanabe S; Morisawa T; Kawai Y; Kozu R; Inoue S (Critical care explorations, 2025)