1. Centre for Cell Biology and Cutaneous Research, Blizard Institute, Queen Mary University of London , London , UK
2. Department of Dermatology, Royal London Hospital, Barts Health NHS Trust , Whitechapel Road, London , UK
3. William Harvey Research Institute, Queen Mary University of London , London, UK
4. Department of Dermatology, Venereology and Andrology, Faculty of Medicine, Alexandria University , Alexandria , Egypt