Imperatori A, Rotolo N, Conti V, Di Natale D, Tropeano V, Mantovani W. Prevalence of heavy smokers in the year 2000 in the Province of Varese, Italy. Monaldi Arch Chest Dis [Internet]. 2016 Jan. 19 [cited 2025 Apr. 2];73(4). Available from: https://www.monaldi-archives.org/macd/article/view/284