Hi Marco. Yes, I am in the UK, greater London area. I was suggesting anesthetic as a trigger rather than a direct cause - if it sets off an existing tendency,that would explain why many people have anesthetic with no ill effects. I'd like a chance to read your paper. I'm a software analyst by training, not a medical person, but my job does involve teasing the causes of problems out of the tangles of effects. Amanda Phillips ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn