1. Cross-sectional study examining the prevalence, correlates and sequencing of electronic cigarette and tobacco use among 11–16-year olds in schools in Wales. Issue 2 (3rd February 2017) Authors: de Lacy, Elen; Fletcher, Adam; Hewitt, Gillian; Murphy, Simon; Moore, Graham Journal: BMJ open Issue: Volume 7:Issue 2(2017) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗