PT - JOURNAL ARTICLE AU - Peter R. Carroll AU - J. Kellogg Parsons TI - Guidelines should be assessed based on the underlying evidence AID - 10.1503/cmaj.72508 DP - 2019 Aug 06 TA - Canadian Medical Association Journal PG - E871--E871 VI - 191 IP - 31 4099 - http://www.cmaj.ca/content/191/31/E871.short 4100 - http://www.cmaj.ca/content/191/31/E871.full SO - CMAJ2019 Aug 06; 191