1文献来源L■nkholm AV,Jensen MB,Eriksen JO,et al.PAM50 risk of recurrence score predicts 10-year distant recurrence in a comprehensive Danish cohort of postmenopausal women allocated to 5 years of endocrine therapy for hormone receptor-positive early breast cancer[J]. J Clin Oncol,2018,36(8):735-740.2证据水平1b。