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We thank Zhou et al for their interest in our manuscript and their insightful comments.1 In figure 4 of our manuscript (Diagnostic approach to a patient with suspected systemic lupus erythematosus and the use of classification criteria to aid clinical diagnosis), we propose an algorithm to aid clinical diagnosis, especially in patients not fulfilling the classification criteria.2 As opposed to classification, diagnosis by definition may include the notion of probability (ie, possible systemic lupus erythematosus (SLE)). Moreover, as …
Handling editor Josef S Smolen
Contributors AF drafted and NT, GB and DTB edited the letter. All authors approved its final form.
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 Commissioned; internally peer reviewed.