As a medical study, I won't pretend to know whether it was properly designed. As policy fodder, which it is first and foremost - it might have benefited from ad

As a medical study, I won't pretend to know whether it was properly designed. As policy fodder, which it is first and foremost - it might have benefited from additional control groups - using substances such as alcohol, nicotine, caffeine, etc. - which might have answered the question of marijuana's harms relative to legal substances.