1. Monash University Endocrine Surgery Unit; Melbourne Victoria Australia
2. The University of Sydney Endocrine Surgical Unit; Sydney New South Wales Australia
3. Otolaryngology Head and Neck Surgery; Monash Medical Centre; Melbourne Victoria Australia
4. Otolaryngology Head and Neck Surgery; Princess Alexandra Hospital; Brisbane Queensland Australia
5. Thyroid and Parathyroid Surgical Divisions; Massachusetts Eye and Ear Infirmary; Boston Massachusetts USA
6. Division of Surgical Oncology and Endocrine Surgery; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts USA