Correction to: Scientific Reports https://doi.org/10.1038/s41598-018-26003-5, published online 14 May 2018

The original version of this Article contained an error in Affiliation 1, which was incorrectly given as ‘Department of Ultrasound, Zhejing Provincial People’s Hospital, Hangzhou, China’. The correct affiliation is listed below:

Department of Ultrasound, Zhejiang Provincial People’s Hospital, Hangzhou, China

This error has now been corrected in the HTML and PDF versions of the Article, and in the accompanying Supplementary information.