Ethical considerations
This study was approved by the Ethics Committee for Human Subjects (IRB) of the relevant Chung Shan Medical University Hospital (No. 20005). The purpose of the study and the process of data collection were explained to eligible patients. Patients then conveyed verbal acceptance and signed a written consent form. Participants were allowed to terminate their participation in the study at any time during the study period if they so wished. Neither participation nor refusal to participate would affect the quality of their medical care. Anonymous coding was used to protect patient privacy, and this study was not sponsored by any suppliers.