Ethical approval
cardiotoxicity, breast cancer
BREAST CANCER
Effects of metformin and donepezil on the prevention of doxorubicin-induced cardiotoxicity in breast cancer patients: a randomized controlled trial was approved by the ethics committee of the Faculty of Medicine, Chiang Mai University, approval number 111/2563. The investigations were carried out in accordance with the Declaration of Helsinki, including the written informed consent of all participants.