Columbia subject headings:
Harvard subject headings:
Diseases--Byzantine Empire--History.
Emperors--Byzantine Empire--Diseases.
Emperors--Byzantine Empire--Medical care.
Emperors--Diseases--Byzantine Empire.
Emperors--Medical care--Byzantine Empire.
Medicine--Byzantine Empire--History.
Princeton subject headings:
Diseases--Byzantine Empire--History.
Emperors--Byzantine Empire--Diseases.
Emperors--Byzantine Empire--Medical care.
Medicine--Byzantine Empire--History.