This work was supported by the National Natural Science Foundation of China (81770705 to Hequn Chen; 82000761 to Y Cui) and Natural Science Foundation of Hunan Province (2017JJ3482 to X Zhang). The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.

No writing assistance was utilized in the production of this manuscript.