About the Authors

Keiko Kurata
School of Library and Information Science, Keio University, Tokyo, Japan

Tomoko Morioka
Kunitachi College of Music Library, Tokyo, Japan

Keiko Yokoi
Tokyo Institute of Technology Library, Tokyo, Japan

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

Corresponding Author

mamiko@slis.tsukuba.ac.jp

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.