Atef, A. M. .; Abdul-Hamid, G. DEMOGRAPHIC PROFILE AND RISK FACTORS OF HEAD AND NECK SQUAMOUS CELL CARCINOMA IN NATIONAL ONCOLOGY CENTER IN ADEN, YEMEN: PROSPECTIVE CROSS-SECTIONAL STUDY. Electron. J. Univ. Aden Basic Appl. Sci. 2024, 5, 225-235.