1. Department of Anatomy and Neurobiology (Y.P., E.H.B., J.R.P., I.L.), University of Maryland-Baltimore, Baltimore, Maryland 21201
2. Division of Endocrinology, Metabolism, and Diabetes (M.L., P.A.), University of Michigan, Michigan 48105
3. Department of Cell and Molecular Biology (M.C.W., N.G.), The Scripps Research Institute, San Diego, California 92037