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> Could this high prevalence of PD be due to genetic factor such as cousin > marriage? I heard that cousin marriage is legal in some parts of the US. it says: >So it was > thought that the cause might be genetic. However, the more closely related > they were, the less they were affected. It would seem in their case brother/sister marriage would be preferable to cousins?? I don't know much about the Amish but I would guess their genetic pool is not very extensive. Perhaps the pesticides are responsible. A pity they did not check maryse ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn