Abdel- Sattar, Ahmed Shawky, et al. “(Frequency of CYP2C19 Gene Polymorphisms (SNP) and Its Impact on Clinical Outcome in Ischemic Heart Disease Patients Taking Clopidogrel After Percutaneous Coronary Intervention (PCI”. Journal of Medical and Pharmaceutical Sciences, vol. 3, no. 1, Dec. 2019, pp. 64-49, https://doi.org/10.26389/AJSRP.A181218.