Looks a bit weird
Naturalistic follow-up of co-morbid substance use in schizophrenia: the West London first-episode study
I. Harrison,
E. M. Joyce,
S. H. Mutsatsa,
S. B. Hutton,
V. Huddy,
M. Kapasi
and T. R. E. Barnes (2008).
Psychological Medicine,
">Volume 38,
Issue 01, January 2008 pp 79-88
http://journals.cambridge.org/action/displayAbstract?aid=1585900