1. Abulafi AM, Allardice JT, Williams NS, Someren N van, Swain CP, Ainley C (1995) Photodynamic therapy for malignant tumours of the ampulla of Vater. Gut 36:853–856
2. Allgayer H (1995) Cost-effectiveness of endoscopic ultrasonography in submucosal tumors. Gastrointest Endosc Clin North Am 5:625–630
3. Amouyal P, Amouyal G, Levy P et al. (1994) Diagnosis of choledocholithiasis by endoscopic ultrasonography. Gastroenterology 106:1062–1067
4. Armengol-Miro JR, Benjamin S, Binmoeller K et al. (1993) Clinical applications of endoscopic ultrasonography in gastroenterology - state of the art 1993. Results of a consensus conference, Orlando, Florida, 19 January 1993. Endoscopy 25:358–366
5. Bansal R, Nostrant TT, Elta GH, Bude R, Thompson N, Scheiman JM (1995) Comparison of radial and sector array endoscopic endoscopic ultrasound (EUS) for localization of pancreatic endocrine tumors (PET). Gastrointest Endosc 41: 296 (Abstract)