Lehmann, R., Brzosko, M., Kopsa, P., Nischik, R., Kreisse, A., Thurston, H., Litschig, S., Sloan, V. S. Efficacy and tolerability of lumiracoxib 100 mg once daily in knee osteoarthritis: a 13-week, randomized, double-blind study vs. placebo and celecoxib. Current Medical Research and Opinion 2005; 4: 517-526