[1] Eastern Virginia Med Sch, Norfolk, VA 23507 USA
[2] Univ N Carolina, Dept Med, Div Cardiol, Chapel Hill, NC USA
[3] E Carolina Univ, Dept Psychol, Greenville, NC 27858 USA
[4] E Carolina Univ, Dept Cardiovasc Sci, Greenville, NC 27858 USA
[5] Duke Univ, Sch Nursing, Durham, NC USA