Relationship of vitamin D, fibrinogen and their ratio with acute coronary syndrome: A comparative analysis of unstable angina, NSTEMI, and STEMI - Himayat Ullah; Sarwat Huma; Muhammad Ashraf; Nafisa Tahir; Ghulam Yasin; Mohammed Yunus; Hossam Shabana; Mohamed Ahmed Muharram; Abdulrahman H. Shalaby; Ahmed Ali Hassan Ali; Mohamed Elwan Mohamed Mahmoud; Ahmed Mahrous Ahmed Ibrahim; et al. (PLoS ONE, 2025)