Tobacco use among public health professionals in Beijing: the relationship between smoking and education level.
Smith
Derek R
DR
Zhang
Xing
X
Zheng
Yuxin
Y
Wang
Rui-Sheng
RS
D002681:China / Q000453:epidemiology; D006282:Health Personnel; D006801:Humans; D011634:Public Health; D012907:Smoking / Q000453:epidemiology*