title: [Clinical and immunological study of two cases of MRA].
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D008297:Male; D008875:Middle Aged; D010996:Pleural Effusion / Q000032:analysis
chemical_list: D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M