Immunohistochemical expression of PD-L1 in colorectal carcinoma among black patients and the clinicopathological correlates: a cross-sectional study. - Menkiti, Felix Emeka; Okani, Chukwudi Onyeaghana; Onyiaorah, Igwebuike Victor; Ukah, Cornelius Ozobia; Menkiti, Ifeoma Oluchukwu; Ihekwoaba, Eric Chukwudi; Okoye, Odili Aloysius; Ofiaeli, Ogochukwu Chioma; Akpuaka, Frank Chinedu (BMC Gastroenterology, 2025)