Funding for this research was provided by:
Svenska Sällskapet för Medicinsk Forskning
Cancerföreningen i Stockholm
Stiftelsen Konung Gustaf V:s Jubileumsfond
Stockholms Läns Landsting
Swedish Breast Cancer Association
Text and Data Mining valid from 2019-01-18
Received: 19 December 2018
Accepted: 21 December 2018
First Online: 18 January 2019
Compliance with ethical standards
: JH is scientific advisor of Visiopharm AG and has obtained advisory board fees from AstraZeneca and Novartis, honoraria and speakers bureau from Roche AB. The other authors declare no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee (Research Ethics Committee at Karolinska Institutet, Stockholm, Sweden) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: The study was based on retrospective clinical data, and no additional patient consent was required in accordance to ethical approval. However, prior to surgery, all patients have approved storage of material in the Stockholm Medical Biobank for clinical and research purposes.