AUTHOR=Zhang Junguo , Qu Hongying , Li Cheng , Li Ziyi , Li Guanming , Tian Junzhang , Li Guowei TITLE=More Caution Needed for Patients Recovered From COVID-19 JOURNAL=Frontiers in Public Health VOLUME=8 YEAR=2020 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2020.562418 DOI=10.3389/fpubh.2020.562418 ISSN=2296-2565