Figure 1

Representative photomicrographs of HIF-1α, HIF-2α, Epo and Epo-R in Barrett's metaplasia–dysplasia–adenocarcinoma sequence. NSE=normal squamous epithelium; CLO=columnar-lined oesophagus; IM, intestinal metaplasia; Dys=dysplasia; Adeno=adenocarcinoma.