[1] UNIV VIRGINIA, SCH MED, CHARLOTTESVILLE, VA 22908 USA
[2] UNIV VIRGINIA, MED CTR, DEPT INTERNAL MED, CHARLOTTESVILLE, VA 22908 USA
[3] UNIV VIRGINIA, MED CTR, DEPT PHARMACOL, CHARLOTTESVILLE, VA 22908 USA
[4] UNIV VIRGINIA, MED CTR, DEPT PEDIAT, CHARLOTTESVILLE, VA 22908 USA
[5] CHILDRENS HOSP, DEPT PEDIAT, PHILADELPHIA, PA 19104 USA
[6] UNIV CINCINNATI, MED CTR, DEPT INTERNAL MED, CINCINNATI, OH 45267 USA
[7] ROYAL POSTGRAD MED SCH, DEPT MED, LONDON W12 0HS, ENGLAND
[8] SALK INST BIOL STUDIES, PEPTIDE BIOL LAB, SAN DIEGO, CA 92138 USA