Columbia subject headings:
B cells--Tumors--Congresses.
T cells--Tumors--Congresses.
Harvard subject headings:
B cells--Tumors--Congresses.
Cancer cells--Congresses
Lymphomas--Congresses.
T cells--Tumors--Congresses.
Princeton subject headings:
B cells--Tumors--Congresses.
T cells--Tumors--Congresses.