title: A diagnostic quandary.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000175:diagnosis* / Q000188:drug therapy; D001241:Aspirin / Q000627:therapeutic use; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D008947:Mixed Connective Tissue Disease / Q000175:diagnosis*; D013997:Time Factors
chemical_list: D001241:Aspirin