@article{Naoya Hirata2017, title={Tobacco nitrosamine NNK increases ALDH-positive cells via ROS-Wnt signaling pathway in A549 human lung cancer cells}, author={Naoya Hirata and Shigeru Yamada and Yuko Sekino and Yasunari Kanda}, journal={The Journal of Toxicological Sciences}, volume={42}, number={2}, pages={193-204}, year={2017}, doi={10.2131/jts.42.193} }