title: Haptoglobin phenotypes.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000235:genetics*; D006242:Haptoglobins / Q000235:genetics*; D006801:Humans; D010641:Phenotype; D013167:Spondylitis, Ankylosing / Q000235:genetics*
chemical_list: D006242:Haptoglobins