The Classical–Basal Spectrum in Pancreatic Ductal Adenocarcinoma: A Developmental Framework for Tumour Cell Plasticity and Clinical Translation - Ikra Khan; Azzadinne Belhaj; Alessandro Gemini; Kenza Azra Ibis; Nouman Darsif; Najoua Rouani; Aude Vanlander; Nouredin Messaoudi (Cancers, 2026)