Acknowledgements
The authors thank all the contributors to this special issue and would like to note that two separate original research articles have been published in the previous year, which present highly relevant developments in South Korea on the topic of the gut-brain axis in Drosophila neurogenetic studies: Jang et al. (Citation2021) and Lim et al. (Citation2021).
Disclosure statement
No potential conflict of interest was reported by the author(s).