Serum Dkk-1 Is Associated with Pain Intensity, Flare-Ups, and Bone Mineral Density in Non-Obese Patients with Knee Osteoarthritis: A Single-Center, Cross-Sectional Study. - Nagy-Finna, Timea-Csilla; Sólyom, Árpád; Székely, János; Kikeli, Pál-István; Szövérfi, Erika-Lídia; Lukács, Hunor; Faragó, Anna-Lilla; Horváth, Emőke; Popoviciu, Horațiu; Nagy, Előd Ernő (International Journal of Molecular Sciences, 2026)