Conflict of interest

No conflict of interest for each author.

Ethics approval and consent to participate

Ethical approval was obtained.

Human and animal rights

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Patient and public involvement

Patients and/or the public were not involved in the design, or conduct, or reporting or dissemination plans of this research.