About the Authors

Qian Li

Affiliation Department of Physiology, Hebei Medical University, Shijiazhuang, China

Na Cui

Affiliation Department of Reproduction, Second Hospital of Hebei Medical University, Shijiazhuang, China

Yuanjie Du

Affiliation Department of Reproduction, Second Hospital of Hebei Medical University, Shijiazhuang, China

Huijie Ma

Affiliation Department of Physiology, Hebei Medical University, Shijiazhuang, China

Yi Zhang

zhyhenry@hotmail.com

Affiliation Department of Physiology, Hebei Medical University, Shijiazhuang, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Performed the experiments: QL NC. Analyzed the data: QL YD. Contributed reagents/materials/analysis tools: QL HM. Wrote the paper: QL YZ.