Mulshine JL, Atkinson JC, Greer RO, Papadimitrakopoulou VA, Van Waes C, Rudy S, Martin JW, Steinberg SM, Liewehr DJ, Avis I, Linnoila RI, Hewitt S, Lippman SM, Frye R, Cavanaugh PF. Randomized, double-blind, placebo-controlled phase IIb trial of the cyclooxygenase inhibitor ketorolac as an oral rinse in oropharyngeal leukoplakia. Clin Cancer Res. 2004 Mar 01; 10(5):1565-73.