This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Melissa Hagan Hughes
Lorillard Tobacco Company, A. W. Spears Research Center, Greensboro, NC, USA
Kyle F. Lott
Lorillard Tobacco Company, A. W. Spears Research Center, Greensboro, NC, USA
J. Daniel Heck
Lorillard Tobacco Company, A. W. Spears Research Center, Greensboro, NC, USA