A. A. Cheema, A. Fakhr, M. S. Khan, S. Shahbaz, S. N. Ahmed, and M. Z. Hussain, “Comparison of Respiratory Complications of COVID-19 among Patients with Rheumatological Conditions Taking Biological Disease-Modifying Anti-Rheumatic Drugs and Conventional Synthetic Disease-Modifying Antirheumatic Drugs”, Pak Armed Forces Med J, vol. 72, no. 4, pp. 1355–58, Sep. 2022, doi: 10.51253/pafmj.v72i4.4498.