1. University Children's Hospital, Paracelsus Medical University (PMU) Salzburg, Salzburg, Austria
2. Moedling Hospital, Moedling, Austria
3. Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
4. Department of Pediatrics, Amalia Children's Hospital, Radboud University Medical Center, Nijmegen, The Netherlands