1. Department of Geriatrics and Medical Gerontology, Geriatrics Research Group, Nursing Research Group Charité – Universitätsmedizin Berlin Berlin Germany
2. Department of Dermatology and Allergology, Clinical Research Center for Hair and Skin Science, Charité – Universitätsmedizin Berlin Berlin Germany
3. Charite Center for Health and Human Sciences, Charité – Universitätsmedizin Berlin Berlin Germany