RT Journal Article SR Electronic T1 In vivo single-photon emission computed tomography imaging of apoptosis in Crohn’s disease and anti-tumour necrosis factor therapy JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 461 OP 463 DO 10.1136/gut.2006.111286 VO 56 IS 4 A1 Alastair J M Watson YR 2007 UL http://gut.bmj.com/content/56/4/461.abstract AB