Comment on

• Photodynamic therapy for Barrett's esophagus: follow-up in 100 patients.

  Overholt BF, Panjehpour M, Haydek JM. Overholt BF, et al. Gastrointest Endosc. 1999 Jan;49(1):1-7. doi: 10.1016/s0016-5107(99)70437-2. Gastrointest Endosc. 1999. PMID: 9869715
• KTP laser destruction of dysplasia and early cancer in columnar-lined Barrett's esophagus.

  Gossner L, May A, Stolte M, Seitz G, Hahn EG, Ell C. Gossner L, et al. Gastrointest Endosc. 1999 Jan;49(1):8-12. doi: 10.1016/s0016-5107(99)70438-4. Gastrointest Endosc. 1999. PMID: 9869716 Clinical Trial.
• Endoscopic fluorescence detection of dysplasia in patients with Barrett's esophagus, ulcerative colitis, or adenomatous polyps after 5-aminolevulinic acid-induced protoporphyrin IX sensitization.

  Messmann H, Knüchel R, Bäumler W, Holstege A, Schölmerich J. Messmann H, et al. Gastrointest Endosc. 1999 Jan;49(1):97-101. doi: 10.1016/s0016-5107(99)70453-0. Gastrointest Endosc. 1999. PMID: 9869731