1. Sudipto Banerjee is Assistant Professor, Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN 55414 . Alan E. Gelfand is J. B. Duke Professor of Statistics, Institute of Statistics and Decision Sciences, Duke University, Durham, NC 27708 . The work of the first author was supported in part by National Institutes of Health (NIH) grant 1-R01-CA95995, and that of the second author was supported in part by NIH grant 2-R01-ES07750. The authors thank Andrew Latimer and...