PT - JOURNAL ARTICLE AU - Roger Collier TI - Is regionalization working? AID - 10.1503/cmaj.109-3167 DP - 2010 Mar 09 TA - Canadian Medical Association Journal PG - 331--332 VI - 182 IP - 4 4099 - http://www.cmaj.ca/content/182/4/331.short 4100 - http://www.cmaj.ca/content/182/4/331.full SO - CMAJ2010 Mar 09; 182