1 University Children's Hospital, Paracelsus Medical University (PMU), Salzburg, Austria and Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Amalia Children's Hospital, Radboudumc, Nijmegen, The Netherlands. s.wortmann@salk.at.
2 Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Austria. t.welponer@salk.at.
3 Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Austria. m.laimer@salk.at.