We first tested the efficacy of Rova-T in four neuroblastoma PDX models using a conventional design of 8–10 mice per arm. In the PDX array, all four of these models had robust DLL3 expression...There was a clear dose–response effect, and all models showed some or significant evidence of antitumor activity at a single 0.6 mg/kg dose (i.e., one injection) of Rova-T...