Response to: 'Idiopathic inflammatory myopathies and antisynthetase syndrome: Contribution of antisynthetase antibodies to improve current classification criteria' by Greco et al

In an effort to improve and harmonise the classification of ASSD, the CLASS (classification criteria of ASSD) project has recently been funded by the American College of Rheumatology and the European League Against Rheumatism. It will be interesting to see if similar results can be repeated using a large and carefully selected cohort.