About the Authors

Toru Takeo

Affiliation Division of Reproductive Engineering, Center for Animal Resources and Development (CARD), Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860–0811, Japan

Naomi Nakagata

nakagata@kumamoto-u.ac.jp

Affiliation Division of Reproductive Engineering, Center for Animal Resources and Development (CARD), Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860–0811, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TT NN. Performed the experiments: TT NN. Analyzed the data: TT NN. Contributed reagents/materials/analysis tools: TT NN. Wrote the paper: TT NN.