Citation:
Yan M, Gong J, Liu Q, Li W, Duan X, Cao S, Li S, He L, Yin Z, Lin W, et al. Prevalence of respiratory diseases in relation to smoking rate in adults living in four Chinese cities: a comparison between 2017-2018 and 1993-1996. Journal of Thoracic DiseaseJournal of Thoracic Disease. 2020;12:6315-+.