作者单位:Department of Venereology and Dermatology, Innsbruck Medical University, Innsbruck, Austria[1]Division of Biological Chemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria[2]Department of Internal Medicine, Innsbruck Medical University, Innsbruck, Austria[3]Metabolic Laboratory, Department of Clinical Chemistry, VU University Medical Center, Amsterdam[4]