1. Department of Internal Medicine, Lahey Hospital and Medical Center, Burlington, Massachusetts
2. Department of Neurology, Lahey Hospital and Medical Center, Burlington, Massachusetts
3. Department of Pulmonary and Critical Care Medicine, Lahey Hospital and Medical Center, Burlington, Massachusetts
4. Department of Radiology, Lahey Hospital and Medical Center, Burlington, Massachusetts
5. Department of Infectious Diseases, Lahey Hospital and Medical Centre, Travel and Tropical Medicine Clinic, Burlington, Massachusetts