[1] Univ Nevada, Sch Med, Dept Pharmacol, Reno, NV 89557 USA
[2] Univ Nevada, Sch Med, Ctr Mol & Cellular Signaling Cardiovasc Syst, Reno, NV 89557 USA
[3] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
[4] Univ Calif San Diego, Sect Neurobiol, La Jolla, CA 92093 USA