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. 2022 Jan 4;42(7):1213–1220. doi: 10.1007/s00296-021-05071-3

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Fig. 1 — A Distribution of patients in the four clinical groups; B Distribution of patients in the four clinical groups compared to expected frequencies based the fraction with lung and cardiac involvement in our cohort; Exp expected distribution; p = 0.83 (Chi-square goodness of fit test)