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Letter
Elevated serum levels of sonic hedgehog are associated with fibrotic and vascular manifestations in systemic sclerosis

https://doi.org/10.1136/annrheumdis-2016-210834

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    Footnotes

    • Contributors CB and JHWD performed and evaluated experiments and wrote the manuscript. All other authors provided samples and clinical data and commented on the manuscript.

    • Competing interests None declared.

    • Ethics approval Approved by the following universities: Erlangen, Zurich, Basel, Paris, Florence, Giessen, Naples.

    • Provenance and peer review Not commissioned; externally peer reviewed.