TY - JOUR T1 - The author responds to “Chronic obstructive pulmonary disease and Occam’s razor” JF - Canadian Medical Association Journal JO - CMAJ SP - E946 LP - E946 DO - 10.1503/cmaj.733142 VL - 189 IS - 28 AU - Andrea S. Gershon Y1 - 2017/07/17 UR - http://www.cmaj.ca/content/189/28/E946.abstract ER -