1. Endocrinology Service, Universidade Federal do Rio de Janeiro and Instituto Nacional do Cancer, Rio de Janeiro, Brazil.
2. Endocrinology Service, Clínica Alemana/Universidad del Desarrollo, Santiago, Chile.
3. Nuclear Medicine Service, Memorial Sloan-Kettering Cancer Center, New York, New York.
4. Endocrinology Service, Memorial Sloan-Kettering Cancer Center, New York, New York.