1. Volume 2, Issue 3, Pages 233-238 (March 2015)
Proportion of patients in south London with first-episode psychosis attributable to use of high potency cannabis: a case-control study 
Dr Marta Di Forti, MD, Arianna Marconi, MD, Elena Carra, MD, Sara Fraietta, MD, Antonella Trotta, MSc, Matteo Bonomo, MSc, Francesca Bianconi, MSc, Poonam Gardner-Sood, PhD, Jennifer O'Connor, PhD, Manuela Russo, PhD, Simona A Stilo, MD, Tiago Reis Marques, PhD, Valeria Mondelli, PhD, Paola Dazzan, PhD, Prof Carmine Pariante, PhD, Prof Anthony S David, MD, Fiona Gaughran, MD, Zerrin Atakan, MD, Conrad Iyegbe, PhD, Prof John Powell, DPhil, Prof Craig Morgan, PhD, Prof Michael Lynskey, PhD, Prof Robin M Murray, FRS 
The Lancet Psychiatry 
Volume 2, Issue 3, Pages (March 2015)
DOI: /S (14)
Copyright © 2015 Di Forti et al. Open Access article distributed under the terms of CC BY Terms and Conditions

2. Figure 1
Patterns of cannabis use between patients with first-episode psychosis and population controls
The Lancet Psychiatry 2015 2, DOI: ( /S (14) )
Copyright © 2015 Di Forti et al. Open Access article distributed under the terms of CC BY Terms and Conditions

3. Figure 2
Probability of individuals having a psychotic disorder by pattern of cannabis use
OR adjusted for age, gender, ethnic origin, education, employment status, and tobacco use. OR=odds ratio. *p<0·05.
The Lancet Psychiatry 2015 2, DOI: ( /S (14) )
Copyright © 2015 Di Forti et al. Open Access article distributed under the terms of CC BY Terms and Conditions