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Title
Risk of upper gastrointestinal ulcer bleeding associated with selective cyclo-oxygenase-2 inhibitors, traditional non-aspirin non-steroidal anti-inflammatory drugs, aspirin and combinations
Authors
Lanas, A; Garcia-Rodriguez, L A; Arroyo, M T; Gomollon, F; Feu, F; Gonzalez-Perez, A; Zapata, E; Bastida, G; Rodrigo, L; Santolaria, S; Guell, M; de Argila, C M; Quintero, E; Borda, F; Pique, J M; on behalf of the Investigators of the Asociacion Espanola de Gastroenterologia (AEG)