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The equipment of the Chutoen General Medical Center was used for this study.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Funding"}},{"value":"The study protocol was approved by the Ethics Committee of Chutoen General Medical Center (approval date: 31 May 2018; approval number: 75) and was conducted according to the principles of the Declaration of Helsinki. Prior consent was obtained via opt-out and inclusion agreements based on the Japanese Ethical Guidelines for Medical and Health Research Involving Human Subjects. We posted an explanation of this study on the internet homepages of the participating institutions, and when a participant stated their intention to withhold consent, we excluded the corresponding data from this study.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval and informed consent"}}]}}