[1] Baylor Coll Med, Michael E DeBakey VA Med Cntr, Houston, TX 77030 USA
[2] Univ Texas Sch Publ Hlth, Houston, TX USA
[3] MedStar Rsch Inst, Baltimore, MD USA
[4] Yale Univ, Sch Med, Nw Haven, CT USA
[5] Univ Maryland, Coll Med, Baltimore, MD 21201 USA
[6] Univ Calif Irvine, Irvine, CA USA
[7] Living Heart Fdn, Little Silver, NJ USA