Columbia subject headings:
Abdomen--Blood-vessels--Diseases--Congresses.
Pelvis--Blood-vessels--Diseases--Congresses.
Veins--Diseases--Congresses.
Harvard subject headings:
Abdomen--Blood-vessels--Diseases--Congresses.
Pelvis--Blood-vessels--Diseases--Congresses.
Veins--Diseases--Congresses.
Princeton subject headings: