title: Erratum to: Glutamate-glutamine and GABA in brain of normal aged and patients with cognitive impairment.
authors.affiliation: Department of Radiology, First Central Clinical College, Tianjin Medical University, Tianjin, 300070, China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Huang
authors.affiliation: Department of Radiology, Tianjin First Center Hospital, Tianjin, 300192, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Liu
authors.affiliation: Department of Radiology, Tianjin First Center Hospital, Tianjin, 300192, China.
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Yin
authors.affiliation: MR Collaborations NE Asia, Siemens Healthcare, Beijing, 100102, China.
authors.forename: Tianyi
authors.initials: T
authors.lastname: Qian
authors.affiliation: Department of Radiology, First Central Clinical College, Tianjin Medical University, Tianjin, 300070, China.
authors.forename: Susan
authors.initials: S
authors.lastname: Shrestha
authors.affiliation: Department of Radiology, Tianjin First Center Hospital, Tianjin, 300192, China. nihyan@sina.com.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Ni