RT Journal Article SR Electronic T1 Bile acid malabsorption and postinfective diarrhoea JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 156 OP 156 DO 10.7861/clinmedicine.1-2-156a VO 1 IS 2 A1 SK Niaz YR 2001 UL http://www.rcpjournals.org/content/1/2/156.2.abstract AB