Mukaddes Tozlu, et al. “Clinical Features and Outcomes of Coronavirus Disease 2019 in Patients With Inflammatory Bowel Disease and Spondyloarthropathies”. Turkish Journal of Gastroenterology, vol. 33, no. 9, Sept. 2022, pp. 751-9, https://tjg.avesjournals.com/index.php/tjg/article/view/5030.