Group 1 - Cannabis only | Group 2 - Cannabis, Alcohol, Tobacco | Group 3 - Cannabis and other illicit substances | Group 4 - Cannabis and herbal medicines |
Barbosa-Leiker20 | Beatty62 | Higgins65 | Westfall (2003)72 |
Bartlett53 | Hotham63 | Klein66 | Westfall (2004)71 |
Chang54 | Morrison64 | Latuskie67 | |
Curry55 | Roberts (2010)68 | ||
Dreher56 | Roberts (2011)69 | ||
Gray57 | Van Scoyoc70 | ||
Holland58 | |||
Jarlenski59 | |||
Mark8 | |||
Oh52 | |||
Postogonova60 | |||
Young-Wolff61 |