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We read with great interest the article by Pablos et al.1 However, we consider some methods and findings in the study that need to be further clarified.
First, detection bias may exist in this study because patients with AI/IMD visit hospitals for medical examinations regularly. Therefore, patients under follow-up in rheumatology department exactly showed higher prevalence of hospital PCR+COVID-19 than the reference population.
Second, to the best of our knowledge, Sjögren’s syndrome is a slow-developing syndrome.2 However, we can find out that …
Footnotes
B-YW and C-HC contributed equally.
Contributors BYW and CHC conceived and wrote the manuscript. JCCW reviewed and commented on the manuscript. All authors approved the final version of the manuscript. The first two authors contributed equally to the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.
Provenance and peer review Not commissioned; internally peer reviewed.