Fig. 4

Copy number variation of SMAD4 and PLEC genes between C1 and C2/3/4 subgroups. a Correlation analysis between SMAD4 expression level and SMAD4 copy number. b SMAD4 expression level between C1 and C2/3/4 subgroups. c Frequency of copy number variation of SMAD4 gene in C1 and C2/3/4 subgroups. d Correlation analysis between PLEC expression level and PLEC copy number. e PLEC expression level between C1 and C2/3/4 subgroups. f Frequency of copy number variation of PLEC gene in the C1 and C2/3/4 subgroups