A family-based study does not support the association of a functional polymorphism in the gene for endothelial nitric oxide synthase with risk for rheumatoid arthritis - Kirsten, Holger; Petit-Teixeira, Elisabeth; Hantmann, Helene; Reichardt, J.; Burkhardt, Jana; Emmrich, Frank; Cornelis, François; Ahnert, Peter (Scandinavian journal of rheumatology, 2009)