Research Centre for Cancer Diagnosis in Primary Care (CaP), Research Unit for General Practice, Bartholins Allé 2, 8000 Aarhus C, Denmark; Department of Public Health, Aarhus University, Bartholins Allé 2, 8000 Aarhus C, Denmark. Electronic address: [Email]
Cancer recurrence is not routinely and completely registered in Danish national health registers, which challenges register-based research. The aim of this study was to develop and validate a register-based algorithm to identify patients with recurrence of breast cancer (BC).
