AUTHOR=Weisshaar Elke TITLE=Itch: A Global Problem? JOURNAL=Frontiers in Medicine VOLUME=8 YEAR=2021 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2021.665575 DOI=10.3389/fmed.2021.665575 ISSN=2296-858X