e/Tobacco and other drugs

Information
has gloss	eng: An association between tobacco and other drug use has been well established. The nature of this association remains unclear. The two main theories are the phenotypic causation (gateway) model and the correlated liabilities model. The causation model argues that smoking is a primary influence on future drug use, while the correlated liabilities model argues that smoking and other drug use are predicated on genetic or environmental factors.
lexicalization	eng: Tobacco and other drugs
instance of	c/Habits