Breast cancer(29) COVID-19(26) Patient(18) COVID-19 pandemic(17) Treatment(15) Care(13) Cancer(12) Breast(12) pandemic(12) enrolled(10) Factor(10) identify(10) physician(10) Health(9) Result(9) Cohort(9) breast cancer patient(8) therapy(8) performed(7) Evidence(7) recommendation(7) participant(7) Support(7) risk(7) Efficacy(7) Local(7) 95% CI(6) clinically(6) mental health(6) scale(6)