A while ago on <i>Newswipe</i>, there was a fantastic segment also by Dr Ben Goldacre (author of the <i>Bad Science</i> column in The Guardian), on the same issue. About 3 mins in: <a href="http://www.youtube.com/watch?v=Cn8trMXe8ok&#38;videos=uwLZJHGvCWE" rel="nofollow">http://www.youtube.com/watch?v=Cn8trMXe8ok&#38;videos=uwLZJH...</a>