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. 2023 Oct 12;18(8):2231–2243. doi: 10.1007/s11739-023-03408-3

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© The Author(s) 2023, corrected publication 2023

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Fig. 1 — Types of arthritis in Still’s patients according to the number of joints involved. Patients with macrophage activation syndrome (MAS) showed significantly different distributions in the number of joints involved by arthritis, when compared to patients without MAS. p values were obtained with the Chi-squared test or the Fisher’s exact test were according to frequency counts and expected frequencies