1. Department of Experimental Medicine, University of L'Aquila, L'Aquila, Italy
2. Ospedale Pediatrico “Bambino Gesù,” Istituto di Ricovero e Cura a Carattere Scientifico, Rome, Italy
3. Department of Rehabilitation and Geriatrics, University Hospital, Geneva, Switzerland
4. Muscle Pathology and Immunology Unit, Istituto Neurologico “C. Besta,” Istituto di Ricovero e Cura a Carattere Scientifico, Milan, Italy
5. Department of Internal Medicine, University Hospital “San Salvatore,” L'Aquila, Italy
6. Metabolic Unit, Istituto Auxologico Italiano, Istituto di Ricovero e Cura a Carattere Scientifico, Milan, Italy