Received: 18 July 2020
Accepted: 18 November 2020
First Online: 27 November 2020
Ethics approval and consent to participate
: The authors report no conflicts of interest relevant to this article. This study was conducted in accordance with the ethical guidelines of the 1975 Declaration of Helsinki and was approved by the Ethical Committee of Ome Municipal General Hospital (approval number: 46). Because of the retrospective nature of the study, informed consent was not required.
: Not applicable.
: The authors declare that they have no competing interests.