Columbia subject headings:
Infection--Complications--Congresses.
Rheumatism--Immunological aspects--Congresses.
Rheumatism--Microbiology--Congresses.
Rheumatoid arthritis--Immunological aspects--Congresses.
Harvard subject headings:
Infection--Complications--Congresses.
Rheumatism--Immunological aspects--Congresses.
Rheumatism--Microbiology--Congresses.
Rheumatoid arthritis--Immunological aspects--Congresses.
Princeton subject headings: