Gait Function at 20 Years or More After Rotationplasty Shows Pseudo Knee Motion, Decreased Walking Speed, and Increased Energy Cost of Walking. - Krebbekx GGJ; Waterval NFJ; Brehm MA; Nollet F; Ham JSJ; Kerkhoffs GMMJ; Schaap GR; Bramer JAM; Verspoor FGM (Clinical orthopaedics and related research, 2026)