[1] Univ Calif Irvine, Program Nursing Sci, Irvine, CA 92697 USA
[2] Univ Calif Irvine, Clin Heart Failure Program, Dept Med, Med Ctr, Irvine, CA 92697 USA
[3] Univ Calif Irvine, Prevent Cardiol Program, Dept Med, Med Ctr, Irvine, CA 92697 USA
[4] Hoag Mem Hosp, Heart Failure Program, Newport Beach, CA USA
[5] Univ Calif Irvine, Palliat Care Serv, Dept Med, Med Ctr, Irvine, CA 92697 USA