1. Bombardier C, Laine L, Reicin A, et al.: Comparison of upper gastrointestinal toxicity of rofecoxib and naproxen in patients with rheumatoid arthritis. N Engl J Med 343:1520?1528, 2000
2. Laine L, Marin-Sorensen M, Weinstein WM: Nonsteroidal antiinflammatory drug-associated gastric ulcers do not require Helicobacter pylori for their development. Am J Gastroenterol 87:1398?1402, 1992
3. Sarosiek J, Marcinkiewicz M, Parolisi S, et al.: The content of prostaglandin E2 in residual gastric juice reflects endoscopic damage to the gastric mucosa after naproxen sodium administration. Am J Gastroenterol 91:873?878, 1996
4. Marcinkiewicz M, Sarosiek J, Peura DA: The relationship between the content of gastric mucus protective components in gastric juice and endoscopic damage to the gastric mucosa after naproxen sodium administration. Am J Gastroenterol 91:360?365, 1996
5. Sarosiek J, Marshall BJ, Peura DA, et al.: Gastroduodenal mucus gel thickness in patients with Helicobacter pylori: A method for assessment of biopsy specimens. Am J Gastroenterol 86:729?734, 1991