Received: 24 December 2020
Accepted: 25 June 2021
First Online: 6 July 2021
: The study was approved by the ethical review board of Central South University before data collection (No.2017037). All methods were carried out in accordance with local guidelines and regulations. The written informed consent was obtained from each participant.
: The Chinese oil paintings used in the study obtained consent for publication from the Li Zijian Art Museum. The clinical images used in the study obtained informed consent for publication from patients.
: The authors declare that they have no competing interests.