Erratum to: Comparison of 18F-labeled CXCR4 antagonist peptides for PET imaging of CXCR4 expression

Erratum to: Comparison of F-labeled CXCR4 antagonist peptides for PET imaging of CXCR4 expression Xiao-Xiang Zhang, Zhongchan Sun, Jinxia Guo, Zhe Wang, Chenxi Wu, Gang Niu, Ying Ma, Dale O. Kiesewetter, Xiaoyuan Chen Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA Department of Cardiology and Molecular Imaging Program, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, 710032, China Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen, 361005, China