[1] Tufts Med Ctr, Boston, MA USA
[2] Univ Cardiol Associates, Augusta, GA USA
[3] Univ Wisconsin, Madison, WI USA
[4] VA Greater Los Angeles, Los Angeles, CA USA
[5] Drexel Univ, Philadelphia, PA 19104 USA
[6] Heart Ctr Res, Huntsville, AL USA
[7] Mercy Hosp, Fairfield, OH USA
[8] Emory Univ, Atlanta, GA 30322 USA
[9] Lahey Med Ctr, Burlington, MA USA
[10] Miriam Hosp, Providence, RI 02906 USA
[11] Ark La Tex Cardiol, Shreveport, LA USA
[12] Cardiovasc Clin Sci Fdn, Boston, MA USA