I delivered an 'opt out' form to my doc sometime last year.
I have not crossed his threshold since July 2008 and take all possible steps to avoid the need to - barring broken legs I think I can cope better without him
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I suppose people who rely on pharmacuticals for survival, feel vulnerable, and so will welcome the database to ease that sense of vulnerability.
I think that it will provide a false sense of security, especially after reading comments here from health workers.