NCT01842828.

Study name	Spain‐UK‐Czech E‐cigarette Study (SUKCES)
Methods	Randomized controlled trial, open‐label pilot study Setting: smoking cessation clinics in London, Madrid and Prague Recuitment: via smoking cessation clinics
Participants	220 people who smoke, seeking help to quit Inclusion criteria: 18 or older Want help to quit Exclusion criteria: Pregnant or breastfeeding; Enrolled in other research; Currently using EC
Interventions	Standard care plus 4 wks EC supply Standard care only
Outcomes	CO‐validated continuous abstinence at 4 and 24 wks post‐TQD Withdrawal symptoms at 1 and 4 wks post‐TQD EC use EC taste and satisfaction compared to conventional cigarettes Adverse events
Starting date	December 2013
Contact information	Peter Hajek, p.hajek@qmul.ac.uk
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