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 Jul 17 TA - Canadian Medical Association Journal PG - 169--171 VI - 177 IP - 2 4099 - http://www.cmaj.ca/content/177/2/169.short 4100 - http://www.cmaj.ca/content/177/2/169.full SO - CMAJ2007 Jul 17; 177