TY - JOUR AU - Lanas, A; García-Rodríguez, L A; Arroyo, M T TI - Risk of upper gastrointestinal ulcer bleeding associated with selective cyclo-oxygenase-2 inhibitors, traditional non-aspirin non-steroidal anti-inflammatory drugs, aspirin and combinations JO - GUT VL - 55 PY - 2006 DO - 10.1136/gut.2005.080754 SP - 1731 EP - 1738 N1 - et al. ER -