title: Letter in response to "Our HER2 is same as yours".
authors.affiliation: Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Matsusaka
authors.affiliation: Department of Surgical Oncology, Gifu University Graduate School of Medicine, Gifu, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Yoshida