1. Pharmacokinetics and Drug Metabolism Department, Amgen Research, 1120 Veterans Boulevard, South San Francisco, California 94080, United States
2. Neuroscience Department, Amgen Research, 360 Binney Street, Cambridge, Massachusetts 02141, United States
3. Comparative Biology and Safety Sciences Department, Amgen Research, 360 Binney Street, Cambridge, Massachusetts 02141, United States