Columbia subject headings:
Kidneys--Congresses.
Kidneys--Diseases--Congresses.
Kidneys--Pathophysiology--Congresses.
Nephrology--Congresses.
Harvard subject headings:
Kidneys--Congresses.
Kidneys--Diseases--Congresses
Kidneys--Pathophysiology--Congresses.
Nephrology--Congresses.
Princeton subject headings: