About the Authors

Jingjing Zhang

Affiliation Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China

Gui Chen

Affiliation Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China

Weiran Li

Affiliation Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China

Tianmin Xu

Affiliation Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China

Xuemei Gao

xmgao@263.net

Affiliation Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XG WL. Performed the experiments: JZ. Analyzed the data: JZ. Contributed reagents/materials/analysis tools: GC TX. Wrote the paper: JZ XG.