Myth. Junk science, exploded completely in four chapters of Marijuana Myths/Marijuana Facts by Lynn Zimmer, Ph.D and John P. Morgan, M.D., including twelve pages of references to studies on that precise point. 
Myth. Junk science, exploded completely in four chapters of Marijuana Myths/Marijuana Facts by Lynn Zimmer, Ph.D and John P. Morgan, M.D., including twelve pages of references to studies on that precise point.
The reference you site is a book and not a medical journal. Is Zimmer and Morgan's work on this subject published in any medical journal?
Oh, I forgot about that.
It was on the New York Times bestseller list for umpteen months, wasn't it??? </sarcasm>