title: Erratum to: The effect of trastuzumab-based chemotherapy in small node-negative HER2-positive breast cancer.
authors.affiliation: Department of Medical Oncology, Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands.
authors.forename: Mette S
authors.initials: MS
authors.lastname: van Ramshorst
authors.affiliation: Netherlands Comprehensive Cancer Organisation, Godebaldkwartier 419, 3511DT, Utrecht, The Netherlands.
authors.forename: Margriet
authors.initials: M
authors.lastname: van der Heiden-van der Loo
authors.affiliation: Department of Medical Oncology, Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands.|Department of Molecular Pathology, Utrecht University Medical Center, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands.
authors.forename: Gwen M H E
authors.initials: GM
authors.lastname: Dackus
authors.affiliation: Department of Medical Oncology, Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands.|Department of Molecular Pathology, Utrecht University Medical Center, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands.
authors.forename: Sabine C
authors.initials: SC
authors.lastname: Linn
authors.affiliation: Department of Medical Oncology, Netherlands Cancer Institute, Plesmanlaan 121, 1066CX, Amsterdam, The Netherlands. g.sonke@nki.nl.
authors.forename: Gabe S
authors.initials: GS
authors.lastname: Sonke