Department of Mathematics, Florida State University, Tallahassee, FL, United States of America.|Brehm Diabetes Center, University of Michigan Medical School, Ann Arbor, MI, United States of America.|Brehm Diabetes Center, University of Michigan Medical School, Ann Arbor, MI, United States of America.|Brehm Diabetes Center, University of Michigan Medical School, Ann Arbor, MI, United States of America.|Department of Mathematics and Programs in Molecular Biophysics and Neuroscience, Florida State University, Tallahassee, FL, United States of America.