Blood-based biomarkers for early frailty are sex-specific: validation of a combined in silico prediction and data-driven approach. - de Jong JCBC; Caspers MPM; Dulos R; Snabel J; van der Hoek MD; van der Leij FR; Kleemann R; Keijer J; Nieuwenhuizen AG; van den Hoek AM; Verschuren L (GeroScience, 2025)