 - Willingness to refrain from use of aspirin, Ibuprofen, Naproxen or any other NSAID prior to each study treatment and chronic use during the entire post-treatment study period. Washout period, if chronic user, for 4 weeks prior to the first treatment. Washout period for limited acute NSAID use, i.e., a maximum of 2-3 doses, is required in the 2 weeks prior to any study treatment visit. 