About the Authors

Keiko Kurata

Affiliation School of Library and Information Science, Keio University, Tokyo, Japan

Tomoko Morioka

Affiliation Kunitachi College of Music Library, Tokyo, Japan

Keiko Yokoi

Affiliation Tokyo Institute of Technology Library, Tokyo, Japan

Mamiko Matsubayashi


Affiliation Faculty of Library, Information and Media Studies, University of Tsukuba, Ibaraki, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KK. Performed the experiments: KK TM KY. Analyzed the data: KK MM. Wrote the paper: KK MM.