E-Cigarettes and Smoking Cessation: Evidence from a Systematic Review and Meta-Analysis Rahman, Muhammad Aziz ; Hann, Nicholas ; Wilson, Andrew ; Mnatzaganian, George ; Worrall-Carter, Linda Abstract Publication: PLoS ONE Pub Date: March 2015 DOI: 10.1371/journal.pone.0122544 Bibcode: 2015PLoSO..1022544R