AUTHOR=Liu Ling TITLE=Methods of liberation from mechanical ventilation: Which one is best? JOURNAL=Frontiers in Medicine VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2022.917369 DOI=10.3389/fmed.2022.917369 ISSN=2296-858X