ROBO1 and neoplasm: The tumour uptake of 111In-anti-ROBO1 was 4.68 ± 1.8, 9.22 ± 1.5, 15.0 ± 0.69, 11.5 ± 4.3, 12.6 ± 1.6, and 6.73 ± 1.1% ID/g at 6, 24, 48, 72, 144, and 240 h after injection, respectively.