A Systematic Review Anne Caroline Krefis 1,*, Matthias Augustin 1, Katharina Heinke Schlünzen 2, Jürgen Oßenbrügge 3 and Jobst Augustin 1 1 Institute for Health Services Research in Dermatology and Nursing (IVDP), University Medical Center Hamburg-Eppendorf (UKE), Martinistr. 52, 20246...