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The protocol was approved by the Ethics Committee of Nagasaki University Hospital (Approval No. 19102143).","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Compliance with ethical requirements"}},{"value":"The authors declare no competing interests.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}},{"value":"Dr. Hajime Imamura, Dr. Tomohiko Adachi, Dr. Takashi Hamada, Dr. Kazushige Migita, Dr. Ayaka Satoh, Dr. Kouki Kurotaki, Dr. Shun Nakamura, Dr. Shinichiro Ogawa, Dr. Baglan Askeyev, Dr. Hajime Matsushima, Dr. Ayaka Kinoshita, Dr. Akihiko Soyama, and Prof. Susumu Eguchi have no conflicts of interest or financial ties to disclose,","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Disclosures"}},{"value":"A video clip showing the intraoperative handling of the variant artery is included as Supplementary Video 1 (as Case 1: A typical case of r-RHA, Case 2:\n                      Rare variant\n                      case).","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Supplementary Information"}}],"article-number":"67"}}