Iqbal, Muhammad Naeem, Asfa Ashraf, Fakhar-un-Nisa Yunus, Ali Muhammad, Saman Alam, Shiwei Xiao, Shahzad Ali, and Muhammad Irfan. 2016. “Prevalence of Angina Pectoris in Relation to Various Risk Factors”. PSM Biological Research 1 (1):6-10. https://psmjournals.org/index.php/biolres/article/view/14.