Columbia subject headings:
Diseases--Causes and theories of causation--Miscellanea.
Diseases--History--20th century--Miscellanea.
Harvard subject headings:
Diseases--Causes and theories of causation--Miscellanea.
Princeton subject headings:
Diseases--Causes and theories of causation--Miscellanea.
Diseases--History--20th century--Miscellanea.