1 Faculty of Sports Sciences, Universidad Europea de Madrid, Spain; Centro de Investigación Biomédica en Red en Fragilidad y Envejecimiento Saludable (CIBERFES) and Research Institute of the Hospital 12 de Octubre ('imas12', PaHerg group), Madrid, Spain.
2 Conegliano Research Centre, IRCCS Eugenio Medea, Italy.
3 Institut d'Investigació Germans Trias i Pujol, Camí de les Escoles, Barcelona, Spain.
4 MRC Centre for Neuromuscular Disease, National Hospital for Neurology and Neurosurgery, London, UK.
5 International Association for Muscle Glycogen Storage Disease, California, USA. Electronic address: stacey.reason@iamgsd.org.
6 Biochemical Genetics Laboratory, Duke Health, Durham, North Carolina, USA.
7 Department of Sport Health and Exercise Sciences, Brunel University, Uxbridge, UK.
8 University of Texas, Southwestern Medical Center, Dallas, USA.
9 Department of Pediatrics, Duke University School of Medicine, Durham, USA.
10 Neurology Department, Raymond-Poincaré Teaching Hospital, Garches, France.
11 Copenhagen Neuromuscular Center, Rigshospitalet, Copenhagen, Denmark.
12 Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Centre, Nijmegen, The Netherlands.
13 U.O.C. di Neurologia e Malattie Neuromuscolari, Dipartimento di Neuroscienze, Messina, Italy.
14 Pablo de Olavide University, Seville, Spain.
15 McMaster University, Health Sciences Centre, Toronto, Canada.
16 U.O.C. di Neurologia e Malattie Neuromuscolari, Dipartimento di Neuroscienze, Messina, Ital.