AUTHOR=Li Yahui , Natakorn Sapermsap , Chen Yu , Safar Mohammed , Cunningham Margaret , Tian Jinshou , Li David Day-Uei TITLE=Corrigendum: Investigations on Average Fluorescence Lifetimes for Visualizing Multi-Exponential Decays JOURNAL=Frontiers in Physics VOLUME=8 YEAR=2021 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2020.637953 DOI=10.3389/fphy.2020.637953 ISSN=2296-424X