Okada, Kazunori http://orcid.org/0000-0002-6180-661X
Kaga, Sanae
Araki, Minami
Tsujita, Kosuke
Yoshikawa, Ayaka
Hara, Mizuki
Sakamoto, Yoichi
Masauzi, Nobuo
Mikami, Taisei
Funding for this research was provided by:
Japanese Society of Sonographers (No. 2017-1)
Article History
Received: 21 June 2019
Accepted: 22 August 2019
First Online: 13 September 2019
Compliance with ethical standards
:
: This study was financially supported by a grant-in-aid for scientific research from the Japanese Society of Sonographers (No. 2017-1). The authors declare no other conflicts of interest.
: This study was approved as a retrospective observational study by the Research Ethics Committee of the Faculty of Health Sciences at Hokkaido University. Instead of obtaining informed consent, the objectives and methods of the present study were shared with the public through our institution’s website and a physical bulletin board; patients who did not wish to participate could request their data to be deleted from the study.