1. Department of Dermatology University Medical Center Regensburg Regensburg Germany
2. Faculty of Chemistry and Pharmacy, Institute of Analytical Chemistry, Chemo‐ and Biosensors University of Regensburg Regensburg Germany
3. Fraunhofer Research Institution for Microsystems and Solid State Technologies EMFT Regensburg Germany
4. Department of Otorhinolaryngology Ludwig Maximilians University Munich Munich Germany