RT Journal Article SR Electronic T1 Are upper gastrointestinal cancer two week referrals an appropriate use of National Health Service resources? JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 412 OP 412 DO 10.7861/clinmedicine.11-4-412 VO 11 IS 4 A1 Kamal Patel A1 Lesley Perkins A1 Steven Mann YR 2011 UL http://www.rcpjournals.org/content/11/4/412.1.abstract