[1] VANDERBILT UNIV, MED CTR, SCH MED, DEPT MED, NASHVILLE, TN 37232 USA
[2] VET ADM MED HOSP, NASHVILLE, TN 37232 USA
[3] RW JOHNSON PHARMACEUT RES INST, RARITAN, NJ USA
[4] JOHNS HOPKINS MED INST, DEPT MED, BALTIMORE, MD 21205 USA
[5] SUNY BUFFALO, DEPT MED, BUFFALO, NY 14260 USA
[6] CLIN RES CTR, HARROW HA1 3UJ, MIDDX, ENGLAND
[7] UNIV CHICAGO, DEPT BIOCHEM & MOLEC BIOL, CHICAGO, IL 60637 USA