[1] Pfizer, Dynam & Metab, Pharmacokinet, Ann Arbor, MI 48105 USA
[2] Potchefstroom Univ Christian Higher Educ, Dept Pharmacol, ZA-2520 Potchefstroom, South Africa
[3] Univ Western Ontario, London Hlth Sci Ctr, Dept Med, London, ON N6A 4G5, Canada
[4] Univ Michigan, Dept Pharmacol, Ann Arbor, MI 48109 USA
[5] Wayne State Univ, Dept Pharmaceut Sci, Detroit, MI 48202 USA