Study Exclusion reasons Remarks Reference(s)
Wolchok, 2010 - inadequate or absent control group

Wolchok Lancet Oncol. 2010; 11:155-64 10.1016/S1470-2045(09)70334-1

Wolchok Ann. Oncol. 2013; 24:2174-80 10.1093/annonc/mdt161