TUBB3 and neoplasm: Kaplan-Meier analysis of OS and relapse-free survival (RFS) using these data showed that TUBB3 expression alone was correlated with RFS when patients were tentatively classified into positive- and negative-expression groups according to the expression level in each tumor (cut off set as the median, p = 0.001) [An additional file shows this in more details (See Additional file 3)].