Marwat, Mushtaq Ahmad, Farooq Javaid, Muhammad Rauf, Shoaib Shah, and Gul Nawab. 2011. “Clinical Efficacy of Diltiazem in Hyperthyroidism”. Journal of Postgraduate Medical Institute 20 (4). https://www.jpmi.org.pk/index.php/jpmi/article/view/1026.