AUTHOR=Yu Lap-Fai , Mousas Christos , Lindlbauer David , Koulieris George Alex , Chan Liwei , McMahan Ryan P. , Amemiya Tomohiro TITLE=Editorial: Professional Training in Extended Reality: Challenges and Solutions JOURNAL=Frontiers in Virtual Reality VOLUME=2 YEAR=2021 URL=https://www.frontiersin.org/journals/virtual-reality/articles/10.3389/frvir.2021.761899 DOI=10.3389/frvir.2021.761899 ISSN=2673-4192