[1] Univ Minnesota, Lillehei Heart Inst, Minneapolis, MN 55455 USA
[2] Univ Minnesota, Cardiovasc Div, Dept Med, Minneapolis, MN 55455 USA
[3] Univ Minnesota, Adv Heart Failure Program, Mech Circulatory Support Serv & Cardiac Transplan, Minneapolis, MN 55455 USA
[4] Univ Minnesota, Dept Med, Minneapolis, MN 55455 USA
[5] Univ Minnesota, Paul & Sheila Wellstone Muscular Dystrophy Ctr, Minneapolis, MN 55455 USA