title: Erratum to: Quality assessment of estrogen receptor and progesterone receptor testing in breast cancer using a tissue microarray-based approach.
authors.affiliation: Department of Medical Oncology, Leiden University Medical Center, Leiden, The Netherlands, T.J.A.Dekker@lumc.nl.
authors.forename: T J A
authors.initials: TJ
authors.lastname: Dekker
authors.forename: S
authors.initials: S
authors.lastname: ter Borg
authors.forename: G K J
authors.initials: GK
authors.lastname: Hooijer
authors.forename: S L
authors.initials: SL
authors.lastname: Meijer
authors.forename: J
authors.initials: J
authors.lastname: Wesseling
authors.forename: J E
authors.initials: JE
authors.lastname: Boers
authors.forename: E
authors.initials: E
authors.lastname: Schuuring
authors.forename: J
authors.initials: J
authors.lastname: Bart
authors.forename: J
authors.initials: J
authors.lastname: van Gorp
authors.forename: P
authors.initials: P
authors.lastname: Bult
authors.forename: S A
authors.initials: SA
authors.lastname: Riemersma
authors.forename: C H M
authors.initials: CH
authors.lastname: van Deurzen
authors.forename: H F B M
authors.initials: HF
authors.lastname: Sleddens
authors.forename: W E
authors.initials: WE
authors.lastname: Mesker
authors.forename: J R
authors.initials: JR
authors.lastname: Kroep
authors.forename: V T H B M
authors.initials: VT
authors.lastname: Smit
authors.forename: M J
authors.initials: MJ
authors.lastname: van de Vijver