Castle, D. & Murray, R. (eds) (2004) Marijuana and Madness: Psychiatry and Neurobiology. Cambridge University Press.
Doll, R. (1992) Sir Austin Bradford Hill and the progress of medical science. BMJ, 305, 1521–1526.
Hill, A. B. (1965) The environment and disease: association or causation?
Proceedings of the Royal Society of Medicine, 58, 293–300.
Jenkins, R., McDaid, D., Brugha, T.
et al (2007) The evidence base in mental health policy and practice. In Mental Health Policy and Practice across Europe (eds Knapp, M., McDaid, D., Mossialos, E.
et al), pp. 100–125. McGraw-Hill/Open University Press.
Kelly, B. D. (2007) The emerging mental health strategy of the European Union: a multi-level work-in-progress. Health Policy, Epub ahead of print. doi:10.1016/j.healthpol.2007.06.005.
Macleod, J. (2007) Cannabis use and psychois: the origins and implications of an association. Advances in Psychiatric Treatment, 13, 400–411.
Macleod, J., Oakes, R., Copello, A.
et al (2004) Psychological and social sequelae of cannabis and other illicit drug use by young people: a systematic review of longitudinal, general population studies. Lancet, 363, 1579–1588.
Moore, T. H. M., Zammit, S., Lingford-Hughes, A.
et al (2007) Cannabis use and risk of psychotic or affective mental health outcomes: a systematic review. Lancet, 370, 319–328.
VanReekum, R., Streiner, D. L. & Conn, D. K. (2001) Applying Bradford Hill's criteria for causation to neuropsychiatry: challenges and opportunities. Journal of Neuropsychiatry and Clinical Neurosciences, 13, 318–325.