Correction to: Scientific Reports https://doi.org/10.1038/s41598-018-29491-7, published online 30 July 2018

The Acknowledgements section in this Article is incomplete.

“Partially supported by Maryland Stem Cell Research Fund”.

should read:

“Partially supported by Maryland Stem Cell Research Fund. The work is also partially supported by Science & Technology Project No. B2017179 from Hubei Provincial Department of Education to H.Z.”