Cluster analysis of symptoms and health seeking behaviour differentiates subgroups of patients with severe irritable bowel syndrome
E Guthrie, F Creed, L Fernandes, J Ratcliffe, J Van der Jagt, J Martin, S Howlett, N Read, J Barlow, D Thompson, B Tomenson
Gut Nov 2003, 52 (11) 1616-1622; DOI: 10.1136/gut.52.11.1616