Here are two things to read regarding the "metals" study results...
http://tobaccoanalysis.blogspot.com/2013/04/new-study-sounds-alarm-about-metals.html
http://tobaccoanalysis.blogspot.com/2013/04/metals-in-electronic-cigarette-vapor.html
http://tobaccoanalysis.blogspot.com/2013/04/new-study-sounds-alarm-about-metals.html
http://tobaccoanalysis.blogspot.com/2013/04/metals-in-electronic-cigarette-vapor.html