Cannabis: it's time for a rethink / Times, 19 Dec 2005

http://www.timesonline.co.uk/article/0,,8123-1937214,00.html
Dr Thomas Stuttaford
"The link between cannabis use and psychosis is proved. The drug must be reclassified. A fear of confusion, loss of memory, a fragmented thought process, the boring repetition of the same thought, swinging moods with laughing or weeping without good cause, paranoia, hallucinations and a preoccupation with their own psyche and physique. These are the symptoms described in an Oxford study on the effects observed in social cannabis smokers"