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The war on drugs has put up barriers to research that have set scientists back in their ability to study the effects of marijuana inhalation on the lungs, but over the past few decades the body of research has been growing

MR-Egger regression analysis indicated no statistical significance, indicating that genetic pleiotropy did not give rise to causal bias

The mean age of smoking initiation was 15.9 years (SD=3.7), and 64.4% (n=1053) had initiated smoking before the age of 18 years

The academy was paying attention even when the gossip press was not

There were no cannabis-only smokers, which reflects current real-world smoking patterns in the studied population but also limits the ability to isolate the independent effect of cannabis