Impact of flavours, device, nicotine levels and price on adult e-cigarette users' tobacco and nicotine product choices.

People are unlikely to switch to another product/device because of the restriction of flavour or nicotine level. If non-tobacco and non-menthol flavours were banned from open-system e-cigarettes, users may switch to menthol flavour e-cigarettes. Intervention strategies should be tailored to specific groups.