Danger posed by drivers who smoke pot on 4/20 is similar to drunk drivers on Super Bowl Sunday

Here's a pro tip from a couple of doctors: Be sure to make special plans on April 20.

That date, of course, is the unofficial holiday devoted to celebrating all things marijuana. (You might know it better as "4/20.")

The two physicians - John Staples of the University of British Columbia and Donald Redelmeier of the University of Toronto - aren't asking that you honor