About the Authors

Wen Deng

Affiliation Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China

Pei Shin Pang

Affiliation Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China

Chi Man Tsang

Affiliation Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China

Pok Man Hau

Affiliation Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China

Yim Ling Yip

Affiliation Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China

Annie L. M. Cheung

Affiliation Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China

Sai Wah Tsao

gswtsao@hkucc.hku.hk

Affiliation Department of Anatomy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China

Competing Interests

The authors have read the journal’s policy and have the following conflicts: Sai Wah Tsao is a PLoS ONE Editorial Board member. This does not alter the authors’ adherence to all the PLoS ONE policies on sharing data and materials. There are no additional competing interests.

Author Contributions

Conceived and designed the experiments: WD SWT. Performed the experiments: WD PSP CMT YLY PMH. Analyzed the data: WD SWT. Contributed reagents/materials/analysis tools: AC. Wrote the paper: WD SWT.