Ethical approval and consent to participate
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
Consent for publication
Informed consent was obtained from the patient.
Dr. Sato and Dr. Tomii have received lecture fees from Novartis Pharma K.K. (Tokyo, Japan). All remaining authors have no conflicts of interest to declare. We wish to confirm that there are no other known conflicts of interest associated with this publication. Further, there was no significant financial support for this work that could have influenced its outcome.