PT - JOURNAL ARTICLE AU - Paul Moorehead TI - No unifying theories but lots of chat AID - 10.1503/cmaj.110420 DP - 2011 Oct 18 TA - Canadian Medical Association Journal PG - 1756--1756 VI - 183 IP - 15 4099 - http://www.cmaj.ca/content/183/15/1756.short 4100 - http://www.cmaj.ca/content/183/15/1756.full SO - CMAJ2011 Oct 18; 183