1 Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, Malmö, Sweden Allergy Center and Department of Dermatology, and Allergy Centre, University Hospital, School of Medicine, Republic University, Montevideo, Uruguay Department of Dermatology and Allergy Centre, Odense University Hospital, University of Southern Denmark Dermatology Department, Buenos Aires University, Clinicas Hospital, Argentina Occupational Dermatology, Ruprecht-Karls-University, Heidelberg, Germany Department of Dermatology, University Clinic Jena, Germany National Skin Centre, Singapore Department of Dermatology, University Hospital and Faculty of Medicine, University of Coimbra, Portugal University Hospital KU Leuven, Dermatology, Leuven, Belgium Department of Dermatology and Venereology, University Hospital Center Zagreb, University of Zagreb School of Medicine, Croatia Department of Dermatology, MGM Medical College, Navi Mumbai, Maharashtra, India Faculty of Medicine and Dentistry, Catholic University of Louvain, Belgium Department of Dermatology, The Catholic University of Korea, Seoul, South Korea Department of Dermatology, UCSF School of Medicine, San Francisco, California. Department of Integrative Medical Science for Allergic Disease, Fujita Health University School of Medicine, Nagoya, Japan Department of Cutaneous Allergy, St John's Institute of Dermatology, London, United Kingdom Occupational Dermatology Research and Education Centre, Skin and Cancer Foundation Inc, Melbourne, Victoria, Australia University of Ottawa, The Ottawa Hospital, Ontario, Canada Institute of Dermatology, Bangkok, Thailand Division of Dermatology, McGill University Health Centre, Montreal General Hospital, Quebec, Canada Department of Dermatology and Venereology, All India Institute of Medical Sciences, New Delhi, India Lund University, Department of Occupational and Environmental Dermatology, Skåne University Hospital, Malmö, Sweden.