Tretinoin and the Prevention of Keratinocyte Carcinoma (Basal and Squamous Cell Carcinoma of the Skin): A Veterans Affairs Randomized Chemoprevention Trial  Martin A. Weinstock, Stephen F. Bingham, John J. DiGiovanna, Amilcar E. Rizzo, Kim Marcolivio, Russell Hall, David Eilers, Mark Naylor, Robert Kirsner, James Kalivas, Gary Cole, Julia E. Vertrees  Journal of Investigative Dermatology  Volume 132, Issue 6, Pages 1583-1590 (June 2012) DOI: 10.1038/jid.2011.483 Copyright © 2012 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 1 Participant flow diagram. VA, Veterans Affairs. Journal of Investigative Dermatology 2012 132, 1583-1590DOI: (10.1038/jid.2011.483) Copyright © 2012 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 2 Time to first in study basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). (a) Product–limit estimate of the proportion developing first BCC (solid and dashed lines represent control and tretinoin groups, respectively). (b) Product–limit estimate of the proportion developing first (SCC). Journal of Investigative Dermatology 2012 132, 1583-1590DOI: (10.1038/jid.2011.483) Copyright © 2012 The Society for Investigative Dermatology, Inc Terms and Conditions