1 Dietmar-Hopp Metabolic Center and Centre for Pediatrics and Adolescent Medicine, University Children's Hospital, Heidelberg, Germany.
2 Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy.
3 Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy.
4 Department of Human Neuroscience, Sapienza University of Rome, Rome, Italy.
5 Department of Pediatrics, Divisions of Metabolism and of Clinical Chemistry and Biochemistry, University of Zürich, Zürich, Switzerland.
6 Global Medical Affairs, PTC Therapeutics, South Plainfield, NJ, USA.
7 Medical Neurogenetics Laboratories, Atlanta, GA, USA.
8 Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy. Electronic address: carla.borrivoltattorni@univr.it.
9 Dietmar-Hopp Metabolic Center and Centre for Pediatrics and Adolescent Medicine, University Children's Hospital, Heidelberg, Germany. Electronic address: Nenad.Blau@kispi.uzh.ch.