[1] ICLAS, Quebec City, PQ J3H 4W1, Canada
[2] Canadian Council Anim Care, Ottawa, ON K1P 5G4, Canada
[3] Johnson & Johnson, B-2340 Beerse, Belgium
[4] Michigan State Univ, Dept Pharmacol & Toxicol, E Lansing, MI 48824 USA
[5] Natl Acad Sci, Inst Lab Anim Res, Washington, DC 20001 USA