Columbia subject headings:
Drugs--Law and legislation--European Union countries.
Drugs--Law and legislation--United States.
Patent laws and legislation--European Union countries.
Patent laws and legislation--United States.
Harvard subject headings:
Competition, Unfair--European Union countries
Competition, Unfair--United States
Drugs--European Union countries--Patents.
Drugs--Law and legislation--European Union countries.
Drugs--Law and legislation--United States.
Drugs--United States--Patents.
Princeton subject headings: