title: Electron microscopical investigation of virus-like particles in rheumatoid synovial membrane.
mesh_terms: D000328:Adult; D000368:Aged; D000917:Antibody Formation; D001172:Arthritis, Rheumatoid / Q000382:microbiology* / Q000473:pathology; D002467:Cell Nucleus; D006651:Histocytochemistry; D006801:Humans; D008854:Microscopy, Electron; D008875:Middle Aged; D009975:Orthomyxoviridae / Q000302:isolation & purification*; D010252:Paramyxoviridae / Q000302:isolation & purification; D013583:Synovial Membrane / Q000382:microbiology* / Q000473:pathology