Newcastle University

Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan

Ichthyosis Support Group, Earley, Reading, Berkshire, UK

Department of Dermatology, Reference Center for Genodermatoses, Necker Enfants Malades Hospital, APHP, Paris, France

Department of Dermatology, Yale University School of Medicine, New Haven, Connecticut, USA

Institute of Human Genetics, University Medical Center, Faculty of Medicine and Center for Cornification Disorders, University of Freiburg, Freiburg, Germany

Department of Dermatology, Maastricht University Medical Center and GROW Research Institute for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands

Reference Center for Rare Skin Diseases, Dermatology Department, CHU Toulouse, Paul Sabatier University, Occitanie, Toulouse, France

Department of Dermatology, Hospital Infantil Universitario Niño Jesús, Madrid, Spain

INSERM UMR 1163, Laboratory of genetic skin diseases, Imagine Institute of Genetic Diseases, University Paris Cité, Paris, France

Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan

Reference Center for Rare Skin Diseases, Dermatology Department, CHU Toulouse, Paul Sabatier University, Occitanie, Toulouse, France

Department of Dermatology, Royal London Hospital and Blizard Institute, Queen Mary University of London, London, UK

Northwestern University Feinberg School of Medicine and the Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA

Department of Dermatology, Medical University Innsbruck and Karl Landsteiner Institute for Paediatic Dermatology and Rare Diseases, Innsbruck, Austria

Pachyonychia Congenita Project, Holladay, Utah, United States

Division of Dermatology, Tel Aviv Sourasky Medical Center and Department of Human Molecular Genetics & Biochemistry, Tel Aviv University, Tel Aviv, Israel

Center for Cutaneous Inherited Diseases, Pediatric Dermatology, Fondazione Ospedale Maggiore Policlinico Milano, University of Milan, Milan, Italy

Department of Dermatology, Stanford University School of Medicine, Palo Alto, California, USA