Impact of Kellgren-Lawrence grade on clinical outcomes following adipose-derived stem cell therapy for knee osteoarthritis: A propensity score-matched retrospective cohort study. - Nakano N; Matsumoto T; Tsubosaka M; Kamenaga T; Ishida K; Osaka R; Otsuji M; Nakamura N; Kuroda Y; Hayashi S; Kuroda R (Cell transplantation, 2026)