These authors contributed equally: Annemiek van Ommen-Nijhof, Noor Wortelboer
These authors jointly supervised this work: Gabe S. Sonke, Inge R. Konings, Agnes Jager
A full list of members and their affiliations appears in the Supplementary Information
Department of Medical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
Gabe S. Sonke & Annemiek van Ommen-Nijhof
Department of Medical Oncology, Erasmus Medical Center Cancer Institute, Rotterdam, The Netherlands
Noor Wortelboer & Agnes Jager
Department of Biometrics, Netherlands Cancer Institute, Amsterdam, The Netherlands
Vincent van der Noort
Clinical Research Department, Netherlands Comprehensive Cancer Organisation, Utrecht, The Netherlands
Astrid C. P. Swinkels & Linda Mol
Erasmus School of Health Policy & Management, Erasmus University Rotterdam, Rotterdam, The Netherlands
Hedwig M. Blommestein
Dutch Breast Cancer Society, Utrecht, The Netherlands
Cristina Guerrero Paez
Department of Medical Oncology, Spaarne Gasthuis, Hoofddorp, The Netherlands
Aart Beeker
Department of Medical Oncology, Rijnstate Hospital, Arnhem, The Netherlands
Karin Beelen
Department of Medical Oncology, Medical Center Leeuwarden, Leeuwarden, The Netherlands
Lisanne C. Hamming
Department of Medical Oncology, Amphia, Breda, The Netherlands
Joan B. Heijns
Department of Medical Oncology, Isala Clinics, Zwolle, The Netherlands
Aafke H. Honkoop
Department of Medical Oncology, St Antonius Hospital, Nieuwegein, The Netherlands
Paul C. de Jong & Paul C. de Jong
Department of Medical Oncology, Franciscus Gasthuis & Vlietland, Schiedam, The Netherlands
Quirine C. van Rossum-Schornagel & Quirine C. van Rossum-Schornagel
Department of Medical Oncology, Meander Medical Center, Amersfoort, The Netherlands
Christa van Schaik-van de Mheen & Christa van Schaik-van de Mheen
Department of Medical Oncology, Jeroen Bosch Hospital, ’s-Hertogenbosch, The Netherlands
Jolien Tol
Department of Medical Oncology, Gelre Hospital, Apeldoorn, The Netherlands
Cathrien S. Tromp-van Driel
Department of Medical Oncology, Northwest Hospital Group, Alkmaar, The Netherlands
Suzan Vrijaldenhoven
Dutch Breast Cancer Research Group, BOOG Study Center, Utrecht, The Netherlands
A. Elise van Leeuwen-Stok
Department of Medical Oncology, Amsterdam University Medical Center, Cancer Center Amsterdam, Amsterdam, The Netherlands
Inge R. Konings
