[1] Biomed Primate Res Ctr, Dept Immunobiol, Rijswijk, Netherlands
[2] Univ Wisconsin, Wisconsin Natl Primate Res Ctr, Dept Obstet & Gynecol, Madison, WI 53715 USA
[3] Kyoto Univ, Primate Res Inst, Dept Behav & Brain Sci, Inuyama, Aichi 484, Japan
[4] German Primate Ctr, Clin Neurobiol Lab, Gottingen, Germany