1. St John's Institute of Dermatology Guy's Hospital London SE1 9RT UK
2. Department of Medical and Molecular Genetics King's College London Guy's Hospital London SE1 9RT UK
3. Greenwich and Lewisham NHS Foundation Trust London SE13 6LH UK
4. Alan Lyell Centre for Dermatology Queen Elizabeth University Hospital Glasgow G51 4TF UK
5. UK FFA Consortium