1. Laboratory Becker, Olgemöller and Colleagues, Munich, Germany
2. Department of General Pediatrics University Children’s Hospital, Heinrich-Heine-University, Düsseldorf, Germany
3. Research Center, Departement of Biochemical Genetics and Molecular Biology, von Hauner Children’s Hospital, Ludwig-Maximilians-Universität, Munich, Germany
4. Otto-Heubner-Center for Pediatric and Adolescent Medicine, Charité University Medical Center, Berlin, Germany