title: Erratum to: Usability study of a simplified electroencephalograph as a health-care system.
abstract: [This corrects the article DOI: 10.1186/s13755-015-0012-z.].
authors.affiliation: Maebashi Institute of Technology, Kamisadori 460-1, Maebashi, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Motomura
authors.affiliation: Ikuei Junior College, Takasaki, Japan.
authors.forename: Muneaki
authors.initials: M
authors.lastname: Ohshima
authors.affiliation: Maebashi Institute of Technology, Kamisadori 460-1, Maebashi, Japan.
authors.forename: Ning
authors.initials: N
authors.lastname: Zhong