Dr. Blaylock does a monthly news letter on health issues that I subscribe to. Recently, the topic was mj. Medical research shows that youth under 18 that use mj have a higher incidence of schizophrenia because of that use when their brain was developing. (and there is additional risk if it is used under the age of 27).
It is stated that even if it is used and then stopped, the damage remains. Several references are given to support this hypothesis.
KEY POINTS: Most disturbing effects of Marijuana use are schizophrenia and psychosis.
The article quotes a study that suggest that about 13% of diagnosed schizophrenia is due to marijuana use by adolescents.

Thanks!
Your screen shot includes no citations for these studies - and I'm not inclined to take the word of a newsletter than froths about marijuana's "destruction of civilized society itself." LOL! Human sacrifice, dogs and cats living together, mass hysteria!
If pot is such a big factor in causing schizophrenia, how is it that the US has one of the lowest rates in the world?