1. Morgridge Institute for Research, Madison, WI 53707–7365, USA.
2. Genome Center of Wisconsin, Madison, WI 53706–1580, USA.
3. Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI 53715–1299, USA.
4. Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA.
5. Department of Anatomy, University of Wisconsin-Madison, Madison, WI 53706–1509, USA.