About the Authors

Baohui Lou

Affiliations Graduate School of Peking Union Medical College, Beijing, China, Beijing Institute of Geriatrics, Beijing Hospital, Beijing, China

Min Chen

cjr.chenmin@vip.163.com

Affiliations Graduate School of Peking Union Medical College, Beijing, China, Department of Radiology, Beijing Hospital, Beijing, China

Xiaojie Luo

Affiliation Department of Radiology, Beijing Hospital, Beijing, China

Yongming Dai

Affiliation Philips Healthcare, Shanghai, China

Competing Interests

The authors have added Yongming Dai as a co-author, who is a researcher employed by Philips Healthcare in China. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: BHL MC. Performed the experiments: BHL MC. Analyzed the data: BHL MC XJL YMD. Contributed reagents/materials/analysis tools: BHL MC XJL YMD. Wrote the paper: BHL MC XJL YMD.