Hello Paul, Thank you for your note. In the rush to send a reply to Kathleen I forgot to mention agrochemicals(pesticides, defoliants and nitrates) but if you've read any of my previous postings I do include the agrochemicals group. I take it your family is in Farming or you happened to be living in a farming area. If you're still living in the same place, do any other members of your family or friends have PD? Would you be prepared to gather some data if I gave you a questionnaire, which I've drafted? This does not include the persons name and even though I'm a Private indivdiual I will observe the Data Protection Act and only make invidual returns available to Third parties with their consent. Look forward to your reply. Regards, Marco ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn