[1] Mayo Clin, Rochester, MN USA
[2] Duke Univ, Durham, NC USA
[3] Advocate Christ Med Cntr, Oak Lawn, IL USA
[4] Sharp Mem Hosp & Rehabil Ctr, San Diego, CA USA
[5] Mayo Clin, Scottsdale, AZ USA
[6] Washington Univ, St Louis, MO USA
[7] Thoratec Corp, Pleasanton, CA USA
[8] Univ Louisville, Louisville, KY 40292 USA