[1] UTHSC Memphis, Internal Med, Memphis, TN USA
[2] Lehigh Valley HealthCare Network, Cardiovasc Med, Allentown, PA USA
[3] Lehigh Valley HealthCare Network, Internal Med, Memphis, PA USA
[4] Univ Memphis, Dept Epidemiol Biostat & Enviornm Hlth, Memphis, TN 38152 USA
[5] St Lukes Univ Hlth Network, Div Cardiovasc Med, Bethlehem, PA USA
[6] Lehigh Valley HealthCare Network, Div Cardiovasc Med, Allentown, PA USA
[7] Mayo Clin Hlth Syst, Cardiovasc Med, Rochester, MN USA
[8] Univ Arizona, Cardiovasc Med, Coll Med, Phoenix, AZ USA
[9] Brigham & Womens Hosp, Div Pulm & Crit Care Med, Boston, MA USA
[10] Harbor UCLA Med Ctr, Div Cardiovasc Med, Los Angeles Biomed Res Inst, Torrance, CA 90509 USA
[11] Brown Univ, Internal Med, Providence, RI 02912 USA
[12] Brigham & Womens Hosp, Internal Med, Boston, MA USA