Received: 23 February 2022
Accepted: 6 June 2022
First Online: 12 June 2022
: This study was approved by the Ethics Committee of Chiba University (approval no. 3425). Informed consent was procured from the participants prior to the study, for the survey that was documented on the Web.All methods were performed in accordance with relevant guidelines and regulations.
: Informed consent was obtained from the photographic subjects (the authors and staff of the Department of Respiratory Medicine in our institution) for the use of the publication of identifying images in an online open-access publication.
: The authors declare that they have no competing interests.