Correction to: Scientific Reports https://doi.org/10.1038/s41598-018-31290-z, published online 27 August 2018

In the original version of this Article, there were errors in Affiliations 6, which was incorrectly listed as ‘Division of Radiation Oncology, Cancer Center, Taipei Veterans General Hospital, Taipei, 11217, Taiwan’.

The correct affiliation is as follows:

‘Division of Radiation Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei, 11217, Taiwan’

This error has now been corrected in the PDF and HTML versions of the Article.