Alleles Arthritis, Rheumatoid Article Base Sequence CD209 antigen CD209 gene CD209 polymorphism Case-Control Studies Cell Adhesion Molecules DC-specific ICAM-3 grabbing nonintegrin Female Gene Frequency Genetic Association Studies Genetic Predisposition to Disease Haplotypes Humans Lectins, C-Type Linkage Disequilibrium Male Middle Aged Polymorphism, Single Nucleotide Promoter Regions, Genetic Receptors, Cell Surface Sanger sequencing Taiwan Taiwanese abatacept adult allele autoimmunity