The original version of this article contained an error in the affiliation of Dahua Yu, which was incorrectly stated as affiliation 3 (Engineering Research Center of Molecular and Neuro Imaging Ministry of Education, Xi'an Shaanxi, 710071, People's Republic of China), when this author is actually linked to affiliation 4 (Inner Mongolia Key Laboratory of Pattern Recognition and Intelligent Image Processing, School of Information Engineering, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, People's Republic of China).