TY - JOUR T1 - Most important risk factor missing from COPD score JF - Canadian Medical Association Journal JO - CMAJ SP - E370 LP - E370 DO - 10.1503/cmaj.71663 VL - 191 IS - 13 AU - Don Eby Y1 - 2019/04/01 UR - http://www.cmaj.ca/content/191/13/E370.abstract N2 - ER -