When tumours were further categorized to low and high expression categories according to Ang2 and CD31 expression scores, as explained in the methods, the CD31 high category consisted of 54 (40%) tumours, the CD31 low category of 82 (60%) tumours, Ang2 high category of 51 (38%) tumours, and Ang2 low category of 85 (62%) tumours (S1A and S1B Fig). The gene discussed is PECAM1; the disease is neoplasm.