CT Attenuation Map-Derived Body Composition Is Associated with Cardiorespiratory Fitness in Multicenter External Validation. - Miller RJH; Yi J; Shanbhag A; Patel K; Ruddy TD; Einstein AJ; Feher A; Miller EJ; Liang JX; Ramirez G; Slipczuk L; Travin MI; et al. (MedRxiv : the preprint server for health sciences, 2026)