Thirty-six other tumor patients’ sera (12 lung cancers, 12 gastric cancers, 12 esophageal cancers) were measured by ELISA to have the MST1 value of 246.20 ± 70.05, which have no difference comparing to colorectal cancer patients (p = 0.11; Table S1; Fig. S1). Here, MST1 is linked to lung cancer.