Table 1.

Search terms used for the collection of articles.

Immune therapy	Enhancer
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Chemotherapy” OR “metronomic chemotherapy”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Epigenetic therapy” OR “hypomethylating agents” OR “Histone deacetylase inhibitors”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Anti-angiogenic therapies” OR “Tyrosine Kinase Inhibitors” OR “Bevacizumab”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Microbiota” OR “gut microbe” OR “microbiome”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Oncolytic Virus” OR “Talimogene Laherparepvec” OR “Coxsackie virus”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Targeted therapy” OR “CDK4/6 Inhibitors” OR “PARP Inhibitors” OR “Other small molecule inhibitors” OR “Bruton Kinase Inhibitors” OR “selective estrogen down regulators”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Radiation” OR “Radiotherapy” OR “abscopal effect”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“T cell co-stimulator” OR “Nectin 4” OR “Enfortumab Vedotin” OR “Interleukin 6”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Drugs targeting renin-angiotensin system OR Losartan”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Drugs targeting autonomous nervous system” OR “Beta Blockers”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Oral hypoglycemic agents” OR “Metformin” OR “Rosiglitazone” OR “pioglitazone”
‘Immune checkpoint Inhibitors’, ‘anti-PD(L)1’, ‘anti CTLA4’	“Drugs targeting Myeloid-derived suppressor cells” and Tregs”