00501nas a2200217   4500000000100000000000100001008004100002100001800043700001600061700001200077700001200089700001300101700001400114700001300128700001800141700001100159245008400170300000800254490000700262022001400269       2019                            d1 aC. Vogelmeier1 aK. Kostikas1 aJ. Fang1 aH. Tian1 aB. Jones1 aC. Morgan1 aR. Fogel1 aF. Gutzwiller1 aH. Cao00aEvaluation of exacerbations and blood eosinophils in UK and US COPD populations  a1780 v20  a1465-9921