Pre-analytical variables affecting breast cancer biomarker expression: A controlled single-specimen study of fixation duration, cold ischemia time, and fixative preparation in a low-resource setting - Clément Parfait Ndengue; Paul Jean Adrien Atangana; Gilbert Roger Ateba; Samuel Honoré Mandengue; Emile Telesphore Mboudou; Carole Else Eboumbou Moukoko (PLoS ONE, 2026)