"details">Details<a class="anchor" aria-label="anchor" href="#details"></a></h2>
    <p>See <code>standardize</code>. The difference is here that different models
can be fitted for each value of <code>x</code> in <code>values</code>.</p>
    </div>
    <div class="section level2">
    <h2 id="references">References<a class="anchor" aria-label="anchor" href="#references"></a></h2>
    <p>Rothman K.J., Greenland S., Lash T.L. (2008).
<em>Modern Epidemiology</em>, 3rd edition.
Lippincott, Williams &amp; Wilkin