RT Journal Article SR Electronic T1 Development of delayed hypersensitivity to dinitrochlorobenzene in patients with Crohn's disease. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 52 OP 56 DO 10.1136/gut.10.1.52 VO 10 IS 1 A1 Jones, J V A1 Housley, J A1 Ashurst, P M A1 Hawkins, C F YR 1969 UL http://gut.bmj.com/content/10/1/52.abstract AB