1 Department of Radiology, Neuroradiology and Nuclear Medicine, Johannes Wesling Medical Center, Ruhr University Bochum Campus Minden, Minden, Germany.
2 Institute of Medical Epidemiology, Biostatistics, and Informatics, Martin-Luther-University Halle-Wittenberg, Halle, Germany.
3 Department of Dermatology, Johannes Wesling Medical Center, Ruhr University Bochum Campus Minden, Minden, Germany. Electronic address: Ralf.Gutzmer@Ruhr-Uni-Bochum.de.