00459nas a2200157   4500000000100000000000100001008004100002100001400043700001300057700001800070700001400088245016700102300001100269490000700280022001400287       2013                            d1 aN. Davies1 aG. Smith1 aF. Windmeijer1 aR. Martin00aCOX-2 selective nonsteroidal anti-inflammatory drugs and risk of gastrointestinal tract complications and myocardial infarction: an instrumental variable analysis  a352-620 v24  a1044-3983