1. The Charing Cross and Westminster Medical School, London, UK
2. The University of Otago, Dunedin, New Zealand
3. The Institute of Medical Genetics, Cardiff, UK
4. The Free University Hospital Brussels, Belgium
5. The Royal Free Hospital and School of Medicine, London, UK
6. The Kumamoto University Medical School, Japan
7. The Institute of Molecular Medicine, Oxford, UK
8. The Université René Descartes, Paris, France