title: 01-05 Cannabis use history and onset to psychosis in an ultrahigh-risk group.
authors.affiliation: School of Behavioural Sciences,The University of Newcastle.
authors.forename: R L
authors.initials: RL
authors.lastname: Greig
authors.affiliation: Psychological Assistance Service, Hunter New England Mental Health.
authors.forename: A L
authors.initials: AL
authors.lastname: Baker
authors.affiliation: School of Behavioural Sciences,The University of Newcastle.
authors.forename: M J
authors.initials: MJ
authors.lastname: Startup
authors.affiliation: Centre for Mental Health Studies,The University of Newcastle and Hunter New England Mental Health.
authors.forename: T J
authors.initials: TJ
authors.lastname: Lewin
authors.affiliation: Psychological Assistance Service, Hunter New England Mental Health.
authors.forename: S A
authors.initials: SA
authors.lastname: Halpin
authors.affiliation: Centre for Mental Health Studies,The University of Newcastle and Hunter New England Mental Health.
authors.forename: V J
authors.initials: VJ
authors.lastname: Carr
authors.affiliation: Psychological Assistance Service, Hunter New England Mental Health.
authors.forename: J
authors.initials: J
authors.lastname: Beckmann