Pan-European study on the prevalence of the feline leukaemia virus infection - Reported by the european advisory board on cat diseases (ABCD Europe) - Studer, Nadine (University of Zurich. Department of Clinical Diagnostics and Services. Center for Clinical Studies.) ; Lutz, Hans (University of Zurich. Department of Clinical Diagnostics and Services. Center for Clinical Studies.) ; Saegerman, Claude (Université de Liège) ; Gönczi, Enikö (University of Zurich. Department of Clinical Diagnostics and Services. Center for Clinical Studies.) ; Meli, Marina L. (University of Zurich. Department of Clinical Diagnostics and Services. Center for Clinical Studies.) ; Boo, Gianluca (University of Zurich. Department of Geography) ; Hartmann, Katrin (Ludwig Maximilian University of Munich. Clinic of Small Animal Medicine) ; Hosie, Margaret J. (University of Glasgow Centre for Virus Research) ; Moestl, Karin (University of Veterinary Medicine. Institute of Virology) ; Tasker, Séverine (University of Bristol. Bristol Veterinary School.) ; Belák, Sándor (Swedish University of Agricultural Sciences (SLU). Department of Biomedical Sciences and Veterinary Public Health) ; Lloret, Albert (Universitat Autònoma de Barcelona. Hospital Clínic Veterinari) ; Boucraut-Baralon, Corine (Scanelis Laboratory) ; Egberink, Herman (University of Utrecht. Department of Infectious Diseases and Immunology) ; Pennisi, Maria-Grazia (Università di Messina. Dipartimento di Scienze Veterinarie) ; Truyen, Uwe (University of Leipzig. Institute of Animal Hygiene and Veterinary Public Health) ; Frymus, Tadeusz (Warsaw University of Life Sciences-SGGW. Department of Small Animal Diseases with Clinic) ; Thiry, Etienne (Liège University. Department of Infectious and Parasitic Diseases) ; Marsilio, Fulvio (Università degli Studi di Teramo. Faculty of Veterinary Medicine) ; Addie, Diane D (University of Glasgow. Veterinary Diagnostic Services) ; Hochleithner, Manfred (Tierklinik Strebersdorf) ; Tkalec, Filip (Veterinarska Klinika Kreszinger) ; Vizi, Zsuzsanna (University of Veterinary Medicine) ; Brunetti, Anna (University of Glasgow. School of Veterinary Medicine) ; Georgiev, Boyko (Institute of Biology Immunology of Reproduction) ; Ludwig-Begall, Louisa F. (Liège University. Department of Infectious and Parasitic Diseases) ; Tschuor, Flurin (Kleintierklinik BolligerTschuor AG. Fachtierärzte für Kleintiere) ; Mooney, Carmel T. (University College Dublin. School of Veterinary Medicine) ; Eliasson, Catarina (Jamaren - Swedish Veterinary Feline Study Group) ; Orro, Janne (Loomakliinik) ; Johansen, Helle (Bygholm Dyrehospital) ; Juuti, Kirsi (CatVet Kissaklinikka) ; Krampl, Igor (Slovak Small Animal Veterinary Association) ; Kovalenko, Kaspars (Latvia University of Lifesciences and Technologies. Faculty of Veterinary Medicine) ; Šengaut, Jakov (Jakov Veterinary Centre) ; Sobral, Cristina (Vetalmada Small Animal Clinic) ; Borska, Petra (Small Animal Emergency Clinic) ; Kovaríková, Simona (University of Veterinary and Pharmaceutical Sciences Brno. Department of Animal Protection Welfare and Behavior) ; Hofmann-Lehmann, Regina (Tierklinik Strebersdorf)