Affiliations

• ¹ Mid-Atlantic Permanente Research Institute, Kaiser Permanente, Mid-Atlantic States, Rockville, Maryland, USA.
• ² Department of General Internal Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
• ³ Department of Emergency Medicine, Kaiser Permanente, Southern California, Los Angeles, California, USA.
• ⁴ Department of Neurology, Kaiser Permanente, Mid-Atlantic States, Rockville, Maryland, USA.
• ⁵ Department of Neurology, Kaiser Permanente, Southern California, Los Angeles, California, USA.
• ⁶ Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA.
• ⁷ Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
• ⁸ Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.