1. Departments of Medicine (S.E., L.Z.), Ontario, Canada M5G 1X5
2. The Freeman Centre for Endocrine Oncology (S.E., L.Z., D.W., S.L.A.), Mount Sinai Hospital; Ontario, Canada M5G 1X5
3. Ontario Cancer Institute (S.E., L.Z., D.W., S.L.A.), University Health Network, Toronto, Ontario, Canada M5G 1X5
4. Laboratory Medicine and Pathobiology (D.W., S.L.A.), University of Toronto; Ontario, Canada M5G 1X5