Quantitative real‐time reverse transcription–polymerase chain reaction analysis of genes: (a) Samd14, (b) Kif21a, and (c) Vwa1 in A/J mouse lung adenoma tissue (T) and its adjacent normal tissue (N). All of the genes selected by methylated CpG island amplification, modified suppression subtractive hybridization, and differential screening. (N, seven cases; T, seven cases). Bars show means ± SD. *Difference was statistically significant (P < 0.05).