1 Department of Internal Medicine, Referral Center for Rare Systemic and Autoimmune Diseases: Vasculitis and Scleroderma, Cochin Hospital, Paris Descartes University, Paris, France.
2 Department of Internal Medicine, Institut Mutualiste Montsouris, Paris, France.
3 Department of Internal Medicine, Referral Center for Rare Systemic and Autoimmune Diseases: Vasculitis and Scleroderma, Cochin Hospital, Paris Descartes University, Paris, France loic.guillevin@aphp.fr.