Funding for this research was provided by:
This work was supported by the Japan Medical Education Foundation under Grant
Received: 28 May 2022
Accepted: 11 April 2023
First Online: 21 April 2023
: This study was performed in accordance with the Declaration of Helsinki and was approved by the Ethics Committee and Institutional Review Board of Chiba University Graduate School of Medicine (Chiba, Japan). The researchers explained the study to the students and obtained their informed and voluntary consent. As a countermeasure against perceived coercion, faculty members explained to students that the study would not be used for university grading.
: Signed statements of informed consent to publish photographs were obtained from all participants.
: The authors declare no competing interests.