If I may, you might be referring to a study by the author David Hammond, from the University of Waterloo.
On February 14th, 2018. See this statement in context.
On February 14th, 2018. See this statement in context.
February 14th, 2018 / 7:15 p.m.
Member, Canadian Vaping Association
If I may, you might be referring to a study by the author David Hammond, from the University of Waterloo.
See context to find out what was said next.