1. Department of Radiology (M.A.B., M.T., B.J.T., R.H.G.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114
2. Neuroendocrine Unit (P.K.F., K.K.M., M.M., A.K.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114
3. Maine Medical Center Research Institute (C.J.R.), Scarborough, Maine 04074