1. Department of Endocrinology, Royal North Shore Hospital, Sydney, Australia.
2. National University Hospital, Singapore.
3. Endocrine Surgery Unit, Royal North Shore Hospital, Sydney, Australia.
4. University of Sydney and Department of Pathology, Royal North Shore Hospital, Sydney, Australia.
5. University of Sydney and Endocrine Surgical Unit, Royal North Shore Hospital, Sydney, Australia.
6. University of Sydney and Department of Endocrinology, Royal North Shore Hospital, Sydney, Australia.