Zafar, Rizwan, Mohammad Asad Ali Saleem, Asfandyar Khan Niazi, Arsalan Ahmad, Aamir Naseer, and Danish Hassan Khan. “A Retrospective Chart Review of the Head-Up Tilt Table Test at a Tertiary Care University Hospital”. Pakistan Heart Journal 56, no. 4 (December 31, 2023): 256–260. Accessed November 23, 2024. https://pakheartjournal.com/index.php/pk/article/view/2606.