1. College of Health-Care Professions Claudiana; Bolzano/Bozen Italy
2. Laboratory of Microbiology and Virology; Bolzano Health District; Bolzano/Bozen Italy
3. Department of Dermatology; Venereology and Allergology; General Hospital Bruneck; Italy
4. Department of Dermatology; Venereology and Allergology; General Hospital Meran/Merano; Italy
5. Department of Dermatology; Venereology and Allergology; Academic Teaching Department of Medical University Innsbruck; Central Teaching Hospital Bolzano/Bozen; Italy