PT - JOURNAL ARTICLE AU - Weiner, Brian C. TI - Chronic obstructive pulmonary disease and Occam’s razor AID - 10.1503/cmaj.733088 DP - 2017 Jul 17 TA - Canadian Medical Association Journal PG - E945--E945 VI - 189 IP - 28 4099 - http://www.cmaj.ca/content/189/28/E945.short 4100 - http://www.cmaj.ca/content/189/28/E945.full SO - CMAJ2017 Jul 17; 189