1. University of Marburg, Faculty of Geography; Laboratory for Climatology and Remote Sensing; Deutschhausstr. 12 Marburg Germany
2. University of Bonn; Department of Otorhinolaryngology/Head and Neck Surgery; Sigmund-Freud-Str. 25 Bonn Germany
3. Klinikum Braunschweig; ENT-Clinic; Holwedestr. 16 Braunschweig Germany
4. Nemaplot; Bonn Germany