The association between trunk muscle stiffness measured using shear wave elastography and VF in women aged 60 and over: a cross-sectional study. - Bayraktar HEN; Okutan İ; Gürün E; Duman GN; Borman P (European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2026)