PT - JOURNAL ARTICLE AU - Grenier, Danielle TI - Active surveillance: an essential tool in safeguarding the health and well-being of children and youth AID - 10.1503/cmaj.070775 DP - 2007 Jun 28 TA - Canadian Medical Association Journal 4099 - http://www.cmaj.ca/content/early/2007/06/28/cmaj.070775.short 4100 - http://www.cmaj.ca/content/early/2007/06/28/cmaj.070775.full