Temporal trends of Barrett’s oesophagus and gastro-oesophageal reflux and related oesophageal cancer over a 10-year period in England and Wales and associated proton pump inhibitor and H2RA prescriptions: a GPRD study - Alexandropoulou, K; Vlymen, Jv; Reid, F; Poullis, A; Kang, J (Eur J Gastroenterol Hepatol, 2013)