Fig 1: Group classification of OS samples based on IHC staining. a IHC staining of ALKBH5, TOM1L2, CDK4, LMO7, COL6A3, and THBS2 in three OS samples from each group (No. 13, No. 68, and No. 79 of OS samples). b Statistical analysis of expression of six gene markers in each OS sample. c Kaplan–Meier curves of overall survival for the three groups of OS patients