title: Biological rhythms in the humoral immune system: their possible significance in rheumatology.
mesh_terms: D000328:Adult; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D006801:Humans; D007136:Immunoglobulins / Q000378:metabolism*; D008875:Middle Aged; D010507:Periodicity
chemical_list: D007136:Immunoglobulins