[1] USDA, FOREIGN ANIM DIS DIAGNOST LAB, GREENPORT, NY 11944 USA
[2] NCI, VIRAL CARCINOGENESIS LAB, FREDERICK, MD 21702 USA
[3] UNIV CALIF DAVIS, CALIF REG PRIMATE RES CTR, DAVIS, CA 95616 USA
[4] UNIV CALIF BERKELEY, DEPT PSYCHOL, BERKELEY, CA 94720 USA
[5] MICHIGAN STATE UNIV, DEPT PSYCHOL, E LANSING, MI 48824 USA
[6] UNIV CALIF DAVIS, DIV ENVIRONM STUDIES, DAVIS, CA 95616 USA
[7] GAME CONSERVANCY, UPLAND RES GRP, NEWTONMORE PH20 1BE, INVERNESS, SCOTLAND
[8] NATL PK BOARD, KRUGER NATL PK, TRANSVAAL 1350, SOUTH AFRICA