Associations of cardiorespiratory fitness with structural brain networks in ageing: insights from The Maastricht Study - Kristina Ukropcova; Kay Deckers; Annemarie Koster; Joost J. A. de Jong; Jacobus F. A. Jansen; Walter H. Backes; Hans H. C. M. Savelberg; Carla van der Kallen; Miranda T. Schram; Sebastian Köhler; Veerle van Gils (GeroScience, 2026)