Table 6.

Frequency of keyword that top 100 cited publications related to chimeric antigen receptor T-cell (CAR-T) from 2008 to 2019.

Keyword	Frequency	Keyword	Frequency
Adoptive immunotherapy	47	Malignancy	10
Lymphocytes	27	Activation	10
Antitumor activity	22	Phase-I	10
Persistence	22	Sustained remissions	9
B-cell	16	PD-1	9
Acute lymphoblastic-leukemia	14	Remissions	8
Leukemia	11	Cytokine release syndrome	8
In-vivo	11	Adverse event	8
CD28	11	CD19	7
Transplantation	11	Non-Hodgkin-lymphoma	7