[1] UNIV WASHINGTON, DEPT CHEM BG10, SEATTLE, WA 98195 USA
[2] UNIV SAN CARLOS, GUATEMALA CITY, GUATEMALA
[3] TEMPLE UNIV, SCH PHARM, PHILADELPHIA, PA 19140 USA
[4] TEMPLE UNIV, SCH MED, PHILADELPHIA, PA 19140 USA
[5] PACIFIC NW LAB, RICHLAND, WA 99352 USA