[1] Med Coll Wisconsin, Dept Physiol, Milwaukee, WI 53226 USA
[2] Med Coll Wisconsin, Human & Mol Genet Ctr, Milwaukee, WI 53226 USA
[3] Case Western Reserve Univ, Cleveland, OH 44106 USA
[4] Med Coll Wisconsin, Bioinformat Res Ctr, Milwaukee, WI 53226 USA
[5] Jackson Lab, Bar Harbor, ME 04609 USA
[6] Harvard Univ, Sch Publ Hlth, Boston, MA 02115 USA