ACKNOWLEDGEMENTS
The corresponding author (M.G.C.) thanks J. L. Hamrick, J. D. Nason, S. R. Keller, and P. Meirmans who have kindly responded to questions related to this mini review. The authors also thank three anonymous reviewers for valuable comments on earlier versions of this paper when submitted to another journal. This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2020R1I1A3074635 to M.Y.C.). K.M. was supported by the National Natural Science Foundation of China (grant no. 31622015), and J.L.-P. was also supported by the Spanish Ministerio de Ciencia e Innovación (project PID2020-119163GB-I00 funded by MCIN/AEI/10.13039/501100011033).