AUTHOR=Yasuda Hiroshi , Sihver Lembit TITLE=Broadening the selection criteria for Astronauts undertaking long–term space travel JOURNAL=Frontiers in Nuclear Medicine VOLUME=2 YEAR=2022 URL=https://www.frontiersin.org/journals/nuclear-medicine/articles/10.3389/fnume.2022.997718 DOI=10.3389/fnume.2022.997718 ISSN=2673-8880