title: Filter a data frame if columns names have not a specific string
body: <p>If this</p>
  <pre><code>data_no_control.loc[:, data_no_control.columns.str.contains('NGS')]
  </code></pre>
  <p>takes values which columns have an 'NGS' in their names.</p>
  <p>How can I take the values of columns which names have not 'NGS' in the name</p>