Fig. 3From: Recent advances of bispecific antibodies in solid tumorsThe classical two-step protocol of pre-targeted radioimmunotherapy (taking TF2 as an example). The first step is to administer the TF2 to blood and offer adequate time for tumor uptake and clearance of excess TF2 in circulation. The second step is to infuse HSG. Finally, excess HSG is cleared from the bloodstream by kidneysBack to article page