Supplement 1. WinBUGS model code.

<h2>File List</h2><blockquote> <p><a href="Byers_WinBUGS_code.txt">Byers_WinBUGS_code.txt</a> -- WinBUGS code </p> </blockquote><h2>Description</h2><blockquote> <p>The file "Byers_WinBUGS_code.txt" contains the code for fitting our hierarchical spatial model. To execute the code, the text must be pasted into a document window in WinBugs.</p> <p><i>Note</i>: WinBUGS parameterizes the normal distribution in terms of the precision parameter "tau" which is the reciprocal of the variance parameter.</p> </blockquote>