Severe Acne Vulgaris and Tobacco Smoking in Young Men Itay Klaz, Ilan Kochba, Tzipora Shohat, Salman Zarka, Sarah Brenner  Journal of Investigative Dermatology  Volume 126, Issue 8, Pages 1749-1752 (August 2006) DOI: 10.1038/sj.jid.5700326 Copyright © 2006 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 1 Relationship between prevalence of severe acne (n=237) and number of cigarettes smoked per day. Journal of Investigative Dermatology 2006 126, 1749-1752DOI: (10.1038/sj.jid.5700326) Copyright © 2006 The Society for Investigative Dermatology, Inc Terms and Conditions