Columbia subject headings:
Bladder--Cancer--Congresses.
Carcinogenesis--Congresses.
Kidneys--Cancer--Congresses.
Species--Congresses.
Thyroid gland--Cancer--Congresses.
Harvard subject headings:
Bladder--Cancer--Congresses
Carcinogenesis--Congresses
Kidneys--Cancer--Congresses
Species--Congresses.
Thyroid--Cancer--Congresses.
Princeton subject headings: