1. Pfizer, Pharmacokinetics, Dynamics and Metabolism, Ann Arbor, Michigan 48015, Wyeth Pharmaceuticals, 500 Arcola Road, Collegeville, Pennsylvania 19426, Pfizer, Pharmacokinetics, Dynamics and Metabolism, Sandwich, Kent CT13 9NJ, U.K., and Pfizer, Discovery Science, Ann Arbor, Michigan 48015