Evaluation of Predictive Markers for Immunotherapy in Colorectal Cancer: Concordance Between MMR Protein Expression and Microsatellite Instability in a Retrospective Series. - Martinelli, Giulia; Bruno, Rossella; Germani, Marco Maria; Poma, Anello Marcello; Vignali, Paola; Cremolini, Chiara; Ugolini, Clara (Journal of Molecular Pathology, 2026)