About the Authors
- Taketo Wakai
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Affiliation Microbiology and Fermentation Laboratory, Calpis Co., Ltd., Sagamihara-shi, Kanagawa, Japan
- Naoyuki Yamamoto
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* E-mail: naoyuki.yamamoto@calpis.co.jp
Affiliation Research and Development Planning Department, Calpis Co., Ltd., Sagamihara-shi, Kanagawa, Japan
Competing Interests
The two authors were employed by a commercial company (CALPIS Co., Ltd.). This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: NY TW. Performed the experiments: TW. Analyzed the data: NY TW. Contributed reagents/materials/analysis tools: TW. Wrote the paper: NY TW.