Aspirin dosage for the prevention of graft occlusion in people undergoing coronary surgery: a systematic review and meta-analysis oleh Fares Alahdab, Ruba Zuhri Yafi, Abdelkader Chaar, Ali Alrstom, Muayad Alzuabi, Omar Alhalabi, Somar Hasan, Mahmoud Mallak, Mohamad Luay Jazayerli, Qusay Haydour, Mohamad Alkhouli, Wedad Alfarkh, Mohammad Hassan Murad