/td>
      <td>los</td>
      <td>supplementary</td>
      <td>fecal</td>
    </tr>
    <tr>
      <th>21</th>
      <td>respiratory viruses</td>
      <td>RSV</td>
      <td>intensive care unit</td>
      <td>strain</td>
      <td>incidence</td>
      <td>parvovirus</td>
      <td>developed</td>
      <td>sore</td>
      <td>protection</td>
      <td>AFE</td>
      <td>lavage</td>
      <td>bacterial infection</td>
      <td>cystic fibrosis</td>
      <td>version</td>
      <td>fecal samples</td>
    </tr>