[1] MILBANK MED CLIN, MILBANK, SD 57252 USA
[2] SISSETON VET CLIN, SISSETON, SD USA
[3] ABERDEEN AREA INDIAN HLTH SERV, SISSETON, SD USA
[4] SISSETON WAHPETON SIOUX TRIBE, SISSETON, SD USA
[5] BROWN CLIN, WATERTOWN, SD USA
[6] BARTRON CLIN, WATERTOWN, SD USA
[7] S DAKOTA DEPT HLTH, PIERRE, SD USA
[8] CDC, NATL CTR INFECT DIS, DIV VIRAL & RICKETTSIAL DIS, VIRAL & RICKETTSIAL ZOONOSES BRANCH, ATLANTA, GA 30333 USA
[9] CDC, NATL CTR INFECT DIS, DIV VIRAL & RICKETTSIAL DIS, SPECIAL PATHOGENS BRANCH, ATLANTA, GA 30333 USA