TI - Evaluation of management strategies and drug therapy problems in patients with angina pectoris: A cross-sectional observational study AU - JAN, F.A. AU - ULLAH, A. AU - JAN, A. AU - RAHIM, A. AU - ULLAH, I. AU - AKBAR, R. SO - Sigma Journal of Engineering and Natural Sciences 2026;44:3067-3076. DO - 10.14744/sigma.2026.2144