1. Department of Molecular Medicine & Surgery and the Center for Molecular Medicine; Karolinska Institutet; Karolinska University Hospital Solna; Stockholm Sweden
2. Program in Epithelial Biology; Stanford University School of Medicine; Stanford CA USA
3. Dermatology Unit; Department of Medicine Solna; Karolinska Institutet; Karolinska University Hospital Solna; Stockholm Sweden
4. Department of Dermatovenereology; Faculty of Medicine; Gondar University; Gondar Ethiopia