del.</p></dd>

  <dt><code>Msigma</code></dt>
<dd><p>Matrix for the dispersion model (or <code>NULL</code> if not provided).</p></dd>

  <dt><code>NE</code></dt>
<dd><p>Number of covariates for the dispersion model (0 if not provided).</p></dd>

  <dt><code>Mrho</code></dt>
<dd><p>Matrix for the correlation model (or <code>NULL</code> if not provided).</p></dd>

  <dt><code>NV</code></dt>
<dd><p>Number of covariates for the correlation model (0 if not provided).</p></dd>

  <dt><code>YSLevels</code></dt>
<d