Text and Data Mining valid from 2018-06-22
Received: 5 June 2018
Accepted: 6 June 2018
First Online: 22 June 2018
Change Date: 16 July 2018
Change Type: Correction
Change Details: After publication of the original article , the authors noticed an error in the Competing interests section.
: SC has no competing interests to declare. LD has conducted research for independent electronic cigarette companies. These companies had no input into the design, conduct or write up of the projects. She has also acted as a consultant for the pharmaceutical industry and as an expert witness in a patent infringement case (2015). MG received a research grant from Pfizer and serves on an advisory board to Johnson & Johnson, manufacturers of smoking cessation medications.
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