[1] Duke Univ, Med Ctr, Durham, NC USA
[2] Univ Michigan, Ann Arbor, MI 48109 USA
[3] Univ Louisville, Louisville, KY 40292 USA
[4] Tufts Med Cntr, Boston, MA USA
[5] HeartWare Inc, Clin & Med Affairs, Framingham, MA USA
[6] HeartWare Inc, Biostat & Data Management, Framingham, MA USA