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We read with great interest the extended report by Lilleker et al 1 on the EuroMyositis registry. Our attention was particularly addressed to antisynthetase syndrome (ASSD) because in the last years we and all members of the AENEAS (American and European Network of Antisynthetase Syndrome) collaborative group strongly contributed2–7 to increase the knowledge on this peculiar disease.
We think that a comparison between our cohorts could be of interest and useful for clinicians, even if the lack of some data in the EuroMyositis paper does not allow us to perform statistical analysis. Both groups collected a very large number of patients (AENEAS collaborative group 813 cases, EuroMyositis 512 cases). The comparison of available …
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Competing interests None declared.
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