Nature Med

"(1) Marijuana has intoxicating effects and may be habit forming and addictive."; (2) "Marijuana impairs concentration, coordination, and judgment. Do not operate a vehicle or machinery under its influence."; (3) "There are health risks associated with consumption of marijuana."; (4) "For use only by adults twenty-one and older. Keep out of the reach of children."; (5) "Marijuana should not be used by women who are pregnant or breast feeding."