6.
Factors associated with secondhand smoke exposure among non-smoking employees in the workplace: A cross-sectional study in Qingdao, China
Xiaocen Jia, Rui Wang, Xiaofei Qiu, Yiqing Huang, Yani Wang, Xiaorong Jia, Shanpeng Li, Yibo Wu, Fei Qi, Jitendra Meena
PLOS ONE