Self-harm in England: a tale of three cities. Multicentre study of self-harm.
Hawton K, Bergen H, Casey D, Simkin S, Palmer B, Cooper J, Kapur N, Horrocks J, House A, Lilley R, et al. Soc Psychiatry Psychiatr Epidemiol. 2007 Jul; 42(7):513-21. Epub 2007 May 21.