title: Alpha, antitrypsin phenotypes in patients with rheumatoid arthritis: a comparison of phenotyping techniques.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000235:genetics*; D004592:Electrophoresis, Starch Gel; D006801:Humans; D007123:Immunoelectrophoresis, Two-Dimensional; D007525:Isoelectric Focusing; D010641:Phenotype; D019896:alpha 1-Antitrypsin Deficiency