1. Department of Neurosciences, College of Medicine & Philippine General Hospital, University of The Philippines Manila, Manila, Philippines
2. Department of Clinical Epidemiology, College of Medicine, University of The Philippines Manila, Manila, Philippines
3. Department of Internal Medicine, Cardinal Santos Medical Center, San Juan City, Philippines
4. Department of Internal Medicine, Section of Neurology, Cardinal Santos Medical Center, San Juan City, Philippines
5. Department of Clinical Neurosciences, University of The East Ramon Magsaysay Memorial Medical Center, Quezon City, Philippines
6. Movement Disorders Service & Section of Neurology, Institute for Neurosciences, St. Luke's Medical Center, Quezon City & Global City, Philippines