Gastrointestinal tumours: let there be light.
Barr
H
H
Gloucester Gastroenterology Group, Gloucestershire Royal and Cranfield University Institute of Medical Sciences, UK.
D004945:Esophagoscopy; D005770:Gastrointestinal Neoplasms / Q000188:drug therapy*; D006801:Humans; D010778:Photochemotherapy