008 Causal effects of COX-2 selective inhibitors relative to non-selective non-steroidal anti-inflammatory drugs on gastrointestinal bleeding and acute myocardial infarction: an instrumental variable analysis
008 Causal effects of COX-2 selective inhibitors relative to non-selective non-steroidal anti-inflammatory drugs on gastrointestinal bleeding and acute myocardial infarction: an instrumental variable analysis