[1] UNIV TEXAS, SW MED CTR, HAROLD C SIMMONS ARTHRIT RES CTR, DEPT INTERNAL MED, DALLAS, TX 75235 USA
[2] UNIV TEXAS, SW MED CTR, HOWARD HUGHES MED INST, DEPT BIOCHEM, DALLAS, TX 75235 USA
[3] UNIV TEXAS, SW MED CTR, DEPT MICROBIOL, DALLAS, TX 75235 USA
[4] JACKSON LAB, BAR HARBOR, ME 04609 USA
[5] UMIST, DEPT CHEM, MANCHESTER M60 1QD, LANCS, ENGLAND
[6] MIT, CTR CANC RES, CAMBRIDGE, MA 02139 USA
[7] MICROMASS UK LTD, MANCHESTER M23 9LE, LANCS, ENGLAND