Drupal-Bibcite31<style face="normal" font="default" size="100%">Variability in risk of gastrointestinal complications with individual non-steroidal anti-inflammatory drugs: results of a collaborative meta-analysis</style><style face="normal" font="default" size="100%">Variability in risk of gastrointestinal complications with individual non-steroidal anti-inflammatory drugs: results of a collaborative meta-analysis</style>