1. Muscle Metabolism Discovery Performance Unit, Metabolic Pathways and Cardiovascular Therapeutic Area, GlaxoSmithKline, Research Triangle Park, North Carolina;
2. KineMed, Inc., Emeryville, California;
3. Platform Sciences and Technology, GlaxoSmithKline, Research Triangle Park, North Carolina; and
4. Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, California