US News said:U.S. tobacco companies are putting strong health warnings on their e-cigarettes, much to the surprise and skepticism of critics.
The warnings are voluntary and are seen by some experts as a way to reduce the companies' legal liability or to enhance their reputations, The New York Times reported.
hxxp:// health usnews com/ health-news/ articles/ 2014/ 09/ 29/ health-highlights-sept-29-2014