1. Queen Elizabeth Hospital Birmingham, Cardiology, Birmingham, United Kingdom
2. Sheffield Teaching Hospitals NHS Trust, South Yorkshire Cardiothoracic Centre, Sheffield, United Kingdom
3. Royal Free Hospital, Lysosomal Storage Disorder Unit, London, United Kingdom
4. Salford Royal Hospital, Mark Holland Metabolic Unit, Manchester, United Kingdom
5. Salford Royal Hospital, Cardiology, Manchester, United Kingdom
6. Queen Elizabeth Hospital Birmingham, Centre for Rare Diseases, Birmingham, United Kingdom