Although having continuously decreased from 70.8% in 1992 to 46.7% in 2009 (Additional file 1: Figure S1), the smoking prevalence in Korean men is still among the highest in member countries of the Organisation for Economic Co-operation and Development (OECD) [13, 14]
Bite off more than you can chew, then keep chewing
K., Boniface, S., Tang, J
Therefore, to develop the proposed reference levels, we examined scientific field studies of surface nicotine levels across a broad range of environments with different known tobacco use histories and observed in different geographic locations
Constriction of blood vessels due to smoking reduces blood supply to several regions of the body, including the scalp