Received: 21 December 2019
Accepted: 21 March 2020
First Online: 28 April 2020
Ethics approval and consent to participate
: N-titin measurements for this study were taken using opt-out recruitment method, as approved by the Ethics Committee of Hitachi General Hospital (2019-37). These four patients were included in another study (UMIN000033783), and consent for CT imaging was already obtained for that study. We obtained written consent from all the patients to use their data for this report. All procedures performed in the study involving human participants were in accordance with the 1964 Declaration of Helsinki and its later amendments or similar ethical standards. Written informed consent from the enrolled patients was waived by the Ethics Committee because the urine samples were obtained after routine laboratory tests.
: Not applicable in this study.
: The authors declare that they have no competing interests.