RT Journal Article SR Electronic T1 Investigation and management of constipation JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 415 OP 420 DO 10.7861/clinmedicine.2-5-415 VO 2 IS 5 A1 Michael J Lamparelli A1 Devinder Kumar YR 2002 UL http://www.rcpjournals.org/content/2/5/415.abstract AB