[1] Michigan State Univ, Coll Osteopath Med, Dept Internal Med, Cardiol Sect, E Lansing, MI 48824 USA
[2] Thorac & Cardiovasc Inst, Heart Dis Prevent Program, E Lansing, MI 48824 USA
[3] Creighton Univ, Omaha, NE 68178 USA
[4] Univ Tennessee, Knoxville, TN 37996 USA
[5] Childrens Hosp, Med Ctr, Cincinnati, OH 45229 USA
[6] Oklahoma State Univ, Stillwater, OK 74078 USA
[7] Abbott Labs, Ross Prod Div, Abbott Pk, IL 60064 USA
[8] Univ Calif Davis, Davis, CA 95616 USA
[9] Univ Toronto, Toronto, ON, Canada
[10] Univ Massachusetts, Lowell, MA 01854 USA