1. 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 (August 2006)
DOI: /sj.jid
Copyright © 2006 The Society for Investigative Dermatology, Inc Terms and Conditions

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