1. Steroids Laboratory, Adrenal and Hypertension Unit, Division of Endocrinology and Metabolism, Department of Medicine, Escola Paulista de Medicina/Universidade Federal de São Paulo (EPM/UNIFESP)
2. Department of Neuroendocrinology, Hospital Brigadeiro, São Paulo, Brazil
3. Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota