Open Access Highly Accessed Research article

Increased frequency of circulating IL-21 producing Th-cells in patients with granulomatosis with polyangiitis (GPA)

Wayel H Abdulahad*, Nikola Lepse, Coen A Stegeman, Minke G Huitema, Berber Doornbos-van der Meer, Henko Tadema, Abraham Rutgers, Pieter C Limburg, Cees GM Kallenberg and Peter Heeringa

Arthritis Research & Therapy 2013, 15:R70  doi:10.1186/ar4247

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