TY - JOUR T1 - An author responds to “Most important risk factor missing from COPD score” JF - Canadian Medical Association Journal JO - CMAJ SP - E371 LP - E371 DO - 10.1503/cmaj.71712 VL - 191 IS - 13 AU - Ian G. Stiell Y1 - 2019/04/01 UR - http://www.cmaj.ca/content/191/13/E371.abstract N2 - ER -