1. Endoscopic laser palliation of malignant dysphagia: A prospective study;Ahlquist;Mayo Clinic Proc,1987
2. Fluorescence bronchoscopy for localizing early bronchial cancer and carcinoma in situ;Balchum;Cancer Res,1982
3. Detection and localization of in situ carcinoma of the bladder with hematoporphyrin derivative;Benson;Mayo Clin Proc,1982
4. Cancer statistics, 1991;Boring;CA,1991
5. Endoscopic laser therapy for oesophageal cancer;Bown;Endoscopy,1986