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Impact of interleukin-21 in the pathogenesis of primary Sjogren's syndrome: increased serum levels of interleukin-21 and its expression in the labial salivary glands
- Equal contributors
Arthritis Research & Therapy 2011, 13:R179 doi:10.1186/ar3504
See related editorial by Scofield, http://arthritis-research.com/content/13/6/137

