Gastro-oesophageal reflux disease in primary care: an international study of different treatment strategies with omeprazole

Rolf Carlsson, John Dent, Richard Watts, Stuart Riley, Raian Sheikh, Jan Hatlebakk, Kjell Haug, Gerrit de Groot, Arnold van Oudvorst, Agneta Dalvag, Ola Junghard, Ingela Wiklund and the international GORD Study Group