480
Participants
Start Date
Not specified
Study Completion Date
May 31, 2003
Durham VA Medical Center, Durham, NC, Durham
VA Ann Arbor Healthcare System, Ann Arbor, MI, Ann Arbor
William S. Middleton Memorial Veterans Hospital, Madison, WI, Madison
VA Palo Alto Health Care System, Palo Alto, CA, Palo Alto
US Department of Veterans Affairs
FED