Author Affiliations: Departments of Emergency Medicine, Inova Fairfax Hospital, Falls Church, Va;
Departments of Infectious Disease, Mid-Atlantic Permanente Medical Group, Kaiser Perrnanente, Rockville,Md;
Author Affiliations: Departments of Emergency Medicine, Inova Fairfax Hospital, Falls Church, Va;
Radiology, Inova Fairfax Hospital, Falls Church, Va;
the Centers for Disease Control and Prevention, Atlanta, Ga;
Author Affiliations: Departments of Emergency Medicine, Inova Fairfax Hospital, Falls Church, Va;
Internal Medicine, Mid-Atlantic Permanente Medical Group, Kaiser Perrnanente, Rockville,Md;
Departments of Infectious Disease, Mid-Atlantic Permanente Medical Group, Kaiser Perrnanente, Rockville,Md;
Radiology, Inova Fairfax Hospital, Falls Church, Va;
Author Affiliations: Departments of Emergency Medicine, Inova Fairfax Hospital, Falls Church, Va;
Author Affiliations: Departments of Emergency Medicine, Inova Fairfax Hospital, Falls Church, Va;
Departments of Infectious Disease, Mid-Atlantic Permanente Medical Group, Kaiser Perrnanente, Rockville,Md;
Author Affiliations: Departments of Emergency Medicine, Inova Fairfax Hospital, Falls Church, Va;
Author Affiliations: Departments of Emergency Medicine, Inova Fairfax Hospital, Falls Church, Va;
Radiology, Inova Fairfax Hospital, Falls Church, Va;
