RT Journal Article SR Electronic T1 Chronic obstructive pulmonary disease and Occam’s razor JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E945 OP E945 DO 10.1503/cmaj.733088 VO 189 IS 28 A1 Weiner, Brian C. YR 2017 UL http://www.cmaj.ca/content/189/28/E945.abstract AB