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Blum A, Sawyers EA, Hofmann-Wellenhof R.Blum A, et al. Among authors: sawyers ea.Hautarzt. 2021 Jul;72(7):640-643. doi: 10.1007/s00105-020-04745-6. Epub 2021 Jan 4.Hautarzt. 2021.PMID: 33398388German.No abstract available.