00396nas a2200157   4500000000100000000000100001008004100002100001500043700001500058700001400073700001400087245010400101300001100205490000800216022001400224       2007                            d1 aJ. Delaney1 aL. Opatrny1 aJ. Brophy1 aS. Suissa00aDrug drug interactions between antithrombotic medications and the risk of gastrointestinal bleeding  a347-510 v177  a0820-3946