Columbia subject headings:
Mononucleosis--Etiology.
Nasopharynx--Cancer--Etiology.
Harvard subject headings:
Burkitt's lymphoma--Etiology.
Epstein-Barr virus.
Mononucleosis--Etiology.
Nasopharynx--Cancer--Etiology.
Princeton subject headings:
Burkitt's lymphoma--Etiology.
Epstein-Barr virus.
Mononucleosis--Etiology.
Nasopharynx--Cancer--Etiology.