1. Department of Dermatology, Inselspital, Bern University Hospital (B.F., N.B., L.B.).
2. Department for BioMedical Research (DBMR), University of Bern, Switzerland (B.F., N.B.).
3. Department of Clinical Genetics, Academic Medical Center, University of Amsterdam, The Netherlands (L.M., J.P.v.T.).
4. Department of Clinical Genetics, Lille University Hospital, CHU Lille, France (L.M.).