Photodynamic therapy for dysplastic Barrett's oesophagus: a prospective, double blind, randomised, placebo controlled trial
R Ackroyd, N J Brown, M F Davis, T J Stephenson, S L Marcus, C J Stoddard, A G Johnson, M W R Reed
Gut Nov 2000, 47 (5) 612-617; DOI: 10.1136/gut.47.5.612
