^a Metabolism and Safety Evaluation, Searle, 4901 Searle Parkway, Skokie, IL 60077, USA

^b Statistical and Mathematical Sciences, Lilly Research Laboratories, Eli Lilly and Company, Greenfield, IN 46140, USA

^c MDS Harris, 621 Rose Street, Lincoln, NE 68502, USA

^d Department of Pharmacokinetics, Dynamics and Metabolism, Parke-Davis Pharmaceutical Research, Division of Warner-Lambert Co., 2800 Plymouth Road, Ann Arbor, MI 48105, USA

^e Bioanalytical, Procter and Gamble Pharmaceuticals, Route 320 Woods Corners, Norwich, NY 13815, USA

^f Clinical Testing Laboratory, Quality Control Department, MedImmune Inc., 636 Research Drive, Frederick, MD 21703, USA

^g Drug Disposition, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285, USA