$20 million grant from the National Cancer Institute enables research into youth e cigarette and oral nicotine use at USC Study suggests uncertainty in e cigarettes' usefulness for quitting smoking Harvard Gazette Vapol's Hot Thiviers Communaut de Communes Prigord Limousin US announces ban on e cigarettes for under 18s BBC News E Cigarettes Public Health Law Center E cigarettes may be 'no better' than regular cigarettes Vaping The Guardian