Department of Statistics, 533 McCarty Hall C, University of Florida, Gainesville, FL 32611, USA. cma@biostat.ufl.edu|Department of Statistics, 533 McCarty Hall C, University of Florida, Gainesville, FL 32611, USA. cma@biostat.ufl.edu|Department of Statistics, 533 McCarty Hall C, University of Florida, Gainesville, FL 32611, USA. cma@biostat.ufl.edu