1. Section of Endocrine Surgery, Department of Surgery, University of California Los Angeles David Geffen School of Medicine, Los Angeles, California, USA.
2. Department of Biostatistics, University of California Los Angeles Fielding School of Public Health, Los Angeles, California, USA.
3. Department of Pathology and Laboratory Medicine, UCLA David Geffen School of Medicine, Los Angeles, California, USA.
4. Department of Pathology, University of California Los Angeles David Geffen School of Medicine, Los Angeles, California, USA.