PT - JOURNAL ARTICLE AU - Collins, Catherine TI - The study of NOELs AID - 10.1503/cmaj.1050011 DP - 2005 Jun 07 TA - Canadian Medical Association Journal PG - 1539--1540 VI - 172 IP - 12 4099 - http://www.cmaj.ca/content/172/12/1539.2.short 4100 - http://www.cmaj.ca/content/172/12/1539.2.full SO - CMAJ2005 Jun 07; 172