Author information:
(1)Department of Neuroscience, Merck Research Laboratories, Kenilworth, NJ 
07033, USA. matthew.kennedy@merck.com andy.stamford1@gmail.com 
ericmcparker@comcast.net mark.forman@merck.com.
(2)Department of Global Chemistry, Merck Research Laboratories, Kenilworth, NJ 
07033, USA. matthew.kennedy@merck.com andy.stamford1@gmail.com 
ericmcparker@comcast.net mark.forman@merck.com.
(3)Department of Neuroscience, Merck Research Laboratories, Kenilworth, NJ 
07033, USA.
(4)Department of Pharmacokinetics, Pharmacodynamics and Drug Metabolism, Merck 
Research Laboratories, Kenilworth, NJ 07033, USA.
(5)Department of Global Chemistry, Merck Research Laboratories, Kenilworth, NJ 
07033, USA.
(6)Department of Clinical Research, Merck Research Laboratories, Kenilworth, NJ 
07033, USA.
(7)PAREXEL, Glendale, CA 91206, USA.
(8)Department of Safety Assessment, Merck Research Laboratories, West Point, PA 
19446, USA.
(9)Department of Biostatistics, Merck Research Laboratories, Kenilworth, NJ 
07033, USA.
(10)Translational Biomarkers Department, Merck Research Laboratories, 
Kenilworth, NJ 07033, USA.
(11)Department of Translational Medicine, Merck Research Laboratories, 
Kenilworth, NJ 07033, USA.
(12)Department of Translational Medicine, Merck Research Laboratories, 
Kenilworth, NJ 07033, USA. matthew.kennedy@merck.com andy.stamford1@gmail.com 
ericmcparker@comcast.net mark.forman@merck.com.