XenoPort Clinical Site, Houston, Texas, United States
XenoPort Investigational Site, Bingham Farms, Michigan, United States
GSK Investigational Site, Evansville, Indiana, United States
GSK Investigational Site, Walla Walla, Washington, United States
GSK Investigational Site, Quebec, Canada
GSK Investigational Site, Vancouver, Washington, United States
GSK Investigational Site, Quebec, Canada
GSK Investigational Site, Berlin, Germany