1. Department of Medicine, Division of Endocrinology and Metabolism, Adrenal and Hypertension Unit, Universidade Federal de São Paulo, R. Pedro de Toledo 781, 13th Fl, São Paulo 04039-032, Brazil.
2. Department of Radiology, University of Alabama, Birmingham, AL.
3. Department of Biostatistics, University of Nebraska Medical Center, Omaha, NE.
4. Department of Endocrinology, Creighton University, Omaha, NE.
5. Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN.