ETHICAL APPROVAL
All procedures involving human participants have been approved according to the ethical standards of the institutional research committee, including the 1964 Helsinki Declaration and its later amendments of comparable ethical standards. Informed consent for participants included in the analysis was checked and approved by the University Hospital’s and Jessenius Faculty of Medicine’s ethical committees and all the signed informed consents are being archived for at least 20 years after conclusion of the research. The reported clinical and research activities are consistent with the Principles of the Declaration of Istanbul as outlined in the Declaration of Istanbul on Organ Trafficking and Transplant Tourism.