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KMB was\u00a0a former full-time employee of Actelion Pharma Schweiz AG. RD received research funding through an Articulum Fellowship sponsored by Pfizer (2013\u20132014), a EULAR training bursary and from the FP-7-DeSScipher project, and speaker fees from Actelion. JB is a full-time employee of Actelion Pharma Schweiz AG. CC received travel support and speaker fees from Actelion and Boehringer Ingelheim. OD has a consultancy relationship and\/or research funding from AnaMar, Bayer, Boehringer Ingelheim, Catenion, CSL Behring, ChemomAb, Roche, GSK, Inventiva, Italfarmaco, Lilly, medac, Medscape, Mitsubishi Tanabe Pharma, MSD, Novartis, Pfizer, Sanofi and UCB in the area of potential treatments of scleroderma and its complications; in addition, OD has licensed patent mir-29 for the treatment of systemic sclerosis. The remaining authors declare that they have no competing interests.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}},{"value":"Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Publisher\u2019s Note"}}],"article-number":"239"}}