1. Department of Neurology, Alfred Hospital, Melbourne, Australia
2. Department of Neuroscience, Monash University, Melbourne, Australia
3. Department of Neurology, Austin Health, Heidelberg, Australia
4. Department of Endocrinology and Diabetes, Alfred Health, Melbourne, Australia
5. Headache and Facial Pain Group, University College London, Queen Square Institute of Neurology, London, UK
6. The National Hospital for Neurology and Neurosurgery, London, UK