Promoter polymorphisms in the chitinase 3-like 1 gene influence the serum concentration of YKL-40 in Danish patients with rheumatoid arthritis and in healthy subjects
Kaspar R Nielsen*, Rudi Steffensen, Martin Boegsted, John Baech, Soeren Lundbye-Christensen, Merete L Hetland, Sophine B Krintel, Hans E Johnsen, Mette Nyegaard and Julia S Johansen