Although a little dated now this article reviews some of the evidence and highlights the need for more research:
http://bjp.rcpsych.org/cgi/content/full/182/2/103
What new evidence have you found since 2003?
Although a little dated now this article reviews some of the evidence and highlights the need for more research:
http://bjp.rcpsych.org/cgi/content/full/182/2/103
What new evidence have you found since 2003?