RT Journal Article SR Electronic T1 Should electronic cigarettes be as freely available as tobacco cigarettes? No JF BMJ : British Medical Journal JO BMJ FD British Medical Journal Publishing Group SP f3840 DO 10.1136/bmj.f3840 VO 346 A1 Chapman, Simon YR 2013 UL http://www.bmj.com/content/346/bmj.f3840.abstract AB