[1] NHLBI, BETHESDA, MD 20205 USA
[2] UNIFORMED SERV UNIV HLTH SCI, DEPT PSYCHIAT, BETHESDA, MD 20014 USA
[3] UNIFORMED SERV UNIV HLTH SCI, DEPT PHARMACOL, BETHESDA, MD 20014 USA
[4] UNIFORMED SERV UNIV HLTH SCI, DEPT MED, BETHESDA, MD 20014 USA
[5] UNIFORMED SERV UNIV HLTH SCI, DEPT CRIT CARE, BETHESDA, MD 20014 USA
[6] UNIV CALIF SAN DIEGO, DEPT MED, SAN DIEGO, CA 92103 USA
[7] HOLT KROCK CLIN, FT SMITH, AR USA
[8] BAYLOR COLL MED, DEPT MED, HOUSTON, TX 77030 USA