NAV3 and breast cancer: When investigating whether NAV3 expression would associate with the recently identified 10 subgroups of breast cancer (Curtis et al, 2012), low NAV3 was associated with groups with the worst outcome: iCluster5 (P = 5.22e-9), iCluster9 (P = 0.0007) and iCluster10 (P = 1.57e-17).