@article{Cao2015, author = "Chunhua Cao and Jianhua Chen and Chengqi Lyu and Jia Yu and Wei Zhao and Yi Wang and Derong Zou", title = "{Demographic characteristics of never smokers and smokers.}", year = "2015", month = "12", url = "https://plos.figshare.com/articles/dataset/_Demographic_characteristics_of_never_smokers_and_smokers_/1616197", doi = "10.1371/journal.pone.0143377.t001" }