Boyce PM, Talley NJ, Balaam B, et al. A randomized controlled trial of cognitive behaviour therapy, relaxation training and routine clinical care for the irritable bowel syndrome. Am J Gastroenterol 2003;98:2209-18.
Inadomi JM, Fennerly MB, Bjorkman D. Systematic review: the economic impact of irritable bowel syndrome. Aliment Pharmacol Ther 2003;18:671-82.
Kennedy T, Jones R, Darnley S, et al. Cognitive behaviour therapy in addition to antispasmodic treatment for irritable bowel syndrome in primary care: randomised controlled trial. BMJ 2005;331:435-7.
Kennedy TM, Chalder T, McCrone P, et al. Cognitive behavioural therapy in addition to antispasmodic therapy for irritable bowel syndrome in primary care: randomised controlled trial. Health Technol Assess 2006;10:19.
McCrone P, Knapp M, Proudfoot J, et al. Cost-effectiveness of computerised cognitive behavioural therapy for anxiety and depression in primary care. Br J Psychiatry 2004;185:55-62.