1. Department of Medicine Johns Hopkins School of Medicine Baltimore Maryland USA
2. Graduate Department of Health Science and Technology University of Brasília Brasília Brazil
3. Department of Neurology Hennepin Healthcare Minneapolis Minnesota USA
4. Department of Neurology SUNY Upstate Medical University Syracuse New York USA
5. ALS Care Clinic/Cardiac Pulmonary Rehab/Therapy Services/Worker's Program Crestwood Medical Center Huntsville Alabama USA
6. Department of Medicine, School of Medicine Washington University in St. Louis St. Louis Missouri USA
7. Department of Neurology Penn State Health Milton S. Hershey Medical Center Hershey Pennsylvania USA