343
Participants
Start Date
October 31, 2004
Primary Completion Date
September 30, 2008
Study Completion Date
September 30, 2008
Hershey
Phoenix
Los Angeles
Boulder
Jacksonville
Macon
Boise
Chicago
Iowa City
Lexington
Detroit
Camden
Charlotte
Winston-Salem
Youngstown
Midwest City
Medford
Portland
Abington
Johnson
Pittsburgh
Kingsport
Dallas
Wichita Falls
Payson
Salt Lake City
La Crosse
Richmond
American Association of Neurological Surgeons
OTHER
Codman & Shurtleff
INDUSTRY