1. Department of Dermatology, UMCG Center of Expertise for Blistering Diseases, University of Groningen, University Medical Center Groningen , Groningen , the Netherlands
2. Department of Health Psychology, University of Groningen, University Medical Center Groningen , Groningen , the Netherlands
3. Department of Genetics, UMCG Center of Expertise for Blistering Diseases, University of Groningen, University Medical Center Groningen , Groningen , the Netherlands