title: Haptoglobulin and   2 -macroglobulin levels in children with rheumatoid arthritis.
mesh_terms: D000293:Adolescent; D000818:Animals; D001171:Arthritis, Juvenile / Q000097:blood* / Q000175:diagnosis; D002648:Child; D002675:Child, Preschool; D005260:Female; D006242:Haptoglobins / Q000032:analysis*; D006736:Horses / Q000276:immunology; D006801:Humans; D007106:Immune Sera; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D007223:Infant; D008259:Macroglobulins / Q000032:analysis*; D008297:Male; D011817:Rabbits / Q000276:immunology
chemical_list: D006242:Haptoglobins; D007106:Immune Sera; D008259:Macroglobulins