Correction to: Biol Proced Online 23, 1 (2021)

https://doi.org/10.1186/s12575-020-00137-1

Following publication of the original article [1], the below Acknowledgement was missing.

Acknowledgements

The authors would like to thank Jane Winnie Cha, a senior designer of The Jackson Laboratory, for her efforts and technical assistance in creating the illustrations. Also, we gratefully acknowledge the contribution of the Histology Service at The Jackson Laboratory for expert assistance with the work described in this publication.

The original article [1] has been corrected.