<a href="http://www.cmaj.ca/news/28_03_06.shtml" target="_blank">http://www.cmaj.ca/news/28_03_06.shtml</a> <a href="http://www.medicalnewstoday.com/articles/104241.php" target="_blank">http://www.medicalnewstoday.com/articles/104241.php</a>