Fig. 3

Validation of the association between mRNA expressions with smoking history in GEO datasets. a GYPC, NME and SLIT2 expression levels were significantly different in smokers vs. non-smokers in GSE13213 dataset. b NME and SLIT2 expression levels were significantly different in smokers vs. non-smokers in GSE41271 dataset. b The three genes expression levels showed no significantly different in smokers vs. non-smokers in GSE41271 dataset