Endoscopic Ultraviolet-Induced Autofluorescence Spectroscopy of the Esophagus: Tissue Characterization and Potential for Early Cancer Diagnosis - Bourg-Heckly, G.; Blais, J.; Padilla, J.-J.; Bourdon, O.; Etienne, J.; Guillemin, F.; Lafay, L. (Endoscopy, 2000)