Cannabis: it matters how young you start - Researchers find that boys who start smoking pot before 15 are much more likely to have a drug problem at 28 than those who start at 15 or after, according to new research (n=1,030) in the Canadian Journal of Psychiatry. - http://nouvelles.umontreal.ca/en/article/2018/05/18/cannabis-it-matters-how-young-you-start/