PT - JOURNAL ARTICLE AU - Kenneth Rockwood TI - The study of NOELs AID - 10.1503/cmaj.1050047 DP - 2005 Jun 07 TA - Canadian Medical Association Journal PG - 1540--1540-a VI - 172 IP - 12 4099 - http://www.cmaj.ca/content/172/12/1540.2.short 4100 - http://www.cmaj.ca/content/172/12/1540.2.full SO - CMAJ2005 Jun 07; 172