1. Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy Charité – Universitätsmedizin Berlin Berlin Germany
2. Department of Pharmaceutical and Health Economics, School of Pharmacy University of Southern California Los Angeles California USA
3. The Leonard D. Schaeffer Center for Health Policy and Economics University of Southern California Los Angeles California USA
4. Nursing Science Charité – Universitätsmedizin Berlin Berlin Germany
5. Department of Clinical Quality and Risk Management Charité – Universitätsmedizin Berlin Berlin Germany
6. Department of Public Health and Primary Care, Skin Integrity Research Group (SKINT) Ghent University, University Centre for Nursing and Midwifery Ghent Belgium