1 Division of Endocrinology and Metabolism (Sawka), Department of Medicine, and University Health Network, University of Toronto, Toronto, Ont.; Division of Endocrinology and Metabolism (Jonklaas), Department of Medicine, Georgetown University, Washington, DC sawkaam@yahoo.com.
2 Division of Endocrinology and Metabolism (Sawka), Department of Medicine, and University Health Network, University of Toronto, Toronto, Ont.; Division of Endocrinology and Metabolism (Jonklaas), Department of Medicine, Georgetown University, Washington, DC.