Refaat, M.M., El Jamal, N., El-Rayess, H.M., Gebran, A. and Salam, A.M. 2024. The impact of diurnal fasting during Ramadan on patients with established cardiac disease: a systematic review. Global Cardiology. 2, 2 (Jun. 2024). DOI:https://doi.org/10.4081/cardio.2024.32.