Khan, Ehtesham, Shankar Lal, Junaid Hashmi, Jubil Thomas, and Muhammad Anwar Malik. “Per-Cutaneous Dilatation Tracheostomy (PCTD) in COVID-19 Patients and Peri-Tracheostomy Care: A Case Series and Guidelines”. Pakistan Journal of Medical Sciences 36, no. 7 (October 19, 2020). Accessed May 2, 2024. https://www.pjms.org.pk/index.php/pjms/article/view/3518.