title: Age at onset of schizophrenia: cannabis, COMT gene, and their interactions.
authors.affiliation: Neurogenetics Section, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
authors.forename: Kim R
authors.initials: KR
authors.lastname: De Sousa
authors.forename: Arun K
authors.initials: AK
authors.lastname: Tiwari
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Giuffra
authors.forename: Bronwyn
authors.initials: B
authors.lastname: Mackenzie
authors.forename: Clement C
authors.initials: CC
authors.lastname: Zai
authors.forename: James L
authors.initials: JL
authors.lastname: Kennedy
mesh_terms: D000293:Adolescent; D000328:Adult; D017668:Age of Onset; D000704:Analysis of Variance; D002394:Catechol O-Methyltransferase / Q000235:genetics*; D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D008297:Male; D008385:Marijuana Smoking / Q000453:epidemiology*; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D012189:Retrospective Studies; D012559:Schizophrenia / Q000453:epidemiology* / Q000235:genetics*; D012737:Sex Factors; D055815:Young Adult
chemical_list: C588010:COMT protein, human; D002394:Catechol O-Methyltransferase