00408nas a2200157   4500000000100000008004100001100001400042700001500056700001800071700001400089700001300103245010100116300001200217490000700229022001400236       2016                            d1 aA. Morgan1 aE. Herrett1 aB. De Stavola1 aL. Smeeth1 aJ. Quint00aCOPD disease severity and the risk of venous thromboembolic events: a matched case-control study  a899-9080 v11  a1176-9106