Upper gastrointestinal haemorrhage complicating antiplatelet treatment with aspirin and/or clopidogrel: where we are now? - Liberopoulos, Evangelos N; Elisaf, Moses S; Tselepis, Alexandros D; Archimandritis, Athanasios; Kiskinis, Dimitris; Cokkinos, Dennis; Mikhailidis, Dimitri P (Platelets, 2006)