1. Department of Endocrine Neurobiology (C.F.), Institute of Experimental Medicine, Hungarian Academy of Sciences, 1083 Budapest, Hungary;
2. Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism (C.F., R.M.L.), Tupper Research Institute, Tufts Medical Center, Boston, Massachusetts 02111;
3. Department of Neuroscience (R.M.L.), Tufts University School of Medicine, Boston, Massachusetts 02111