Supplementary Methods from Preclinical Development and First-in-Human Imaging of the Integrin α&lt;sub&gt;v&lt;/sub&gt;β&lt;sub&gt;6&lt;/sub&gt; with [&lt;sup&gt;18&lt;/sup&gt;F]α&lt;sub&gt;v&lt;/sub&gt;β&lt;sub&gt;6&lt;/sub&gt;-Binding Peptide in Metastatic Carcinoma