Scientific Reports 5: Article number: 16805; published online: 18 November 2015; updated: 16 September 2016.

In the original version of this Article, Affiliation 1 was incorrectly given as ‘Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, Division of Interventional Ultrasound, Sun Yat-Sen University, 58 Zhong Shan Road 2, Guangzhou, 510080, China’. The correct affiliation is listed below:

Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, Division of Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University, Sun Yat-Sen University, 58 Zhong Shan Road 2, Guangzhou, 510080, China.

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